Perfect Swiss Meringue Buttercream

Made from 5 ingredients, this is perfect Swiss meringue buttercream. Written in easy terms with in-depth instructions and troubleshooting tips, this post teaches you how to make the best meringue buttercream even if you’ve failed before or if it’s your first try. This frosting is creamy, silky smooth, holds its shape beautifully, and the best part—and why everyone loves it—is that it’s not extra sweet like traditional American vanilla buttercream.

swiss meringue buttercream

Do you want to master Swiss Meringue Buttercream (SMBC) but are too nervous to try it? I get it, the thought of making meringue as the base of a frosting sounds complicated, timely, and intimidating. Let me break down that barrier for you—this recipe is where you start.


What is Swiss Meringue Buttercream?

Swiss meringue buttercream joins other varieties—French and Italian—as a stable, not overly sweet frosting. The process for each is a little different, but the Swiss method is arguably the easiest. Swiss meringue buttercream is made from cooked egg whites and sugar, butter, and flavorings like vanilla and salt. Whip the cooked egg whites and sugar into stiff peaks, then slowly add the butter before adding flavors. It’s out-of-this-world creamy, extra smooth, and the perfect sweetness for any confection. The whipping process is long and where some trouble can start, including never reaching stiff peaks. The butter can also melt, leaving you with SMBC soup. Or you can over-whip everything into curdles.

It’s a little more complicated than my whipped frosting, but it’s worth it! Today I’m putting you on the right SMBC track, plus there’s usually a fix for everything—and I teach you how in this post.

This Swiss Meringue Buttercream Is:

  • Made from 5 basic ingredients
  • Silky smooth and buttery
  • Thick and ultra creamy
  • Perfect for piping or spreading
  • Flavored with vanilla and a touch of salt
  • Not cloyingly sweet like traditional frosting
vanilla swiss meringue buttercream

Ingredients

Let me explain why each ingredient is important. Feel free to keep scrolling to the full recipe written below.

  1. Egg Whites: Egg whites and sugar form the meringue. Just as I recommend when making French macarons, use fresh eggs instead of carton egg whites. Here are all my recipes using leftover egg yolks. Success tip: Eggs separate much easier when they’re cold.
  2. Granulated Sugar: Use regular granulated sugar, not confectioners’ sugar.
  3. Unsalted Butter: Butter turns meringue into meringue buttercream. I recommend unsalted butter because salted butter tastes overpowering. Keep in mind that the frosting will turn soupy and thin if the butter is too warm. Make sure you’re using butter that is slightly cooler than proper room temperature butter. Remove butter from the refrigerator and set it out for just 30-40 minutes before you need to use it. It should be cool to the touch, about 60°F (16°C). For accuracy, I recommend using an instant read thermometer. Cut butter into Tablespoon size pieces before using.
  4. Vanilla Extract: Adds flavor. See FAQs below for other flavor options.
  5. Salt: Some SMBC recipes don’t use salt, but I strongly recommend it for another layer of flavor. You may be wondering why you can’t just use salted butter and skip the added salt, so make sure you review Salted Vs Unsalted Butter in Baking.
Swiss meringue buttercream on cupcakes

Swiss Meringue Buttercream Video Tutorial


How to Make Swiss Meringue Buttercream

Here’s an overview of the steps. Full instructions available in the recipe below. Feel free to keep scrolling to the full recipe if you’d like!

  1. Get rid of any grease residue. Wipe all tools that will touch the meringue with a little lemon juice or white vinegar. Grease or fat prevents your meringue from setting up.
  2. Separate the eggs. Save the yolks for another recipe.
  3. Cook the egg whites & sugar: Whisk sugar & egg whites together, then set the bowl over a saucepan filled with simmering water. Do not let the bottom of the mixing bowl touch the water. Whisk the whites and sugar constantly until sugar is dissolved and mixture has thinned out. The mixture will be thick and tacky at first, then thin out and appear frothy on top. To test that it’s ready, you can use your finger or an instant read thermometer. Lightly and quickly dip your finger (it’s very hot, be careful) and rub the mixture between your thumb and finger. You shouldn’t feel any sugar granules. If using a thermometer, the temperature should read 160°F (71°C).
  4. Whip it: Transfer warm mixture to the bowl of a stand mixer fitted with a whisk attachment (if you aren’t already using the metal bowl that comes with it). Beat until stiff peaks form and the meringue is no longer warm to touch, at least 10-15 minutes. On particularly humid days, it will take longer. If it’s still not reaching stiff peaks, stop the mixer, place the bowl in the refrigerator for 10 minutes, then return to the mixer and continue beating until stiff peaks form.
  5. If the bowl and meringue still feel warm at this point, wait until both cool to room temperature (around 70°F (21°C)) before adding the butter.
  6. Add the butter and flavor: Switch the stand mixer to the paddle attachment and add the butter 1 Tablespoon at a time. Wait for the butter to fully mix in before adding the next. After all the butter has been added, beat in vanilla and salt. Done!

A small egg separator is a helpful tool in this recipe.

egg whites for meringue

Cook and whisk egg whites and sugar over indirect heat. When it’s ready, the mixture will be frothy on top and thin. (Below, right.)

cooking egg whites and sugar on stove

What Are Stiff Peaks?

After several minutes of mixing, the meringue should form stiff glossy peaks. This means it forms stiff, smooth, and sharp points in the bowl or on the lifted whisk attachment.

Stiff peaks do not droop down.

stiff peaks for Swiss meringue

After reaching stiff peaks, let the meringue cool for a bit, then beat in the butter 1 Tablespoon at a time.

Success Tip: Because butter needs to be on the cooler side, I don’t remove it from the refrigerator and cut it into Tbsp pieces until I start whipping the meringue.

cool room temperature butter

Add vanilla and salt, then you’re done. Buttercream is now deliciously creamy and smooth!

vanilla swiss meringue buttercream

5 Helpful Tools

  1. Saucepan & heatproof bowl: Cook egg whites and sugar on indirect heat in a heatproof bowl set over a pan of simmering water. (I just use the metal mixing bowl that comes with a stand mixer.) This cooking method is essentially how we cook the eggs in French silk pie and make homemade marshmallow creme. If you own a double boiler, just use that.
  2. Whisk: Constantly whisking the egg whites and sugar as they gently cook is key.
  3. Electric Mixer: Beating the meringue into stiff peaks requires an electric mixer. I strongly recommend a stand mixer, but a handheld mixer can work. Give your arm a break every few minutes because the beating steps are tiresome. A handheld mixer will take longer to beat the meringue, too.
  4. Egg Separator: Though not required, it’s vastly helpful to have an egg separator to ensure no yolks make it into the mixing bowl. I generally recommend stocking your kitchen with an egg separator because they’re an inexpensive tool you can use for so many recipes like French macarons and chocolate soufflé.
  5. Instant Read Thermometer: Though also not required, it’s helpful to have an instant read thermometer (or a candy/oil thermometer) to determine the safe temperature of cooked egg whites, as well as the ideal temperature for the butter. Less mistakes this way.
Is it safe to eat?

Provided you aren’t allergic to any of these ingredients, yes. The eggs are cooked to 160°F (71°C), which is considered safe to eat for everyone including pregnant women and children. As always, use your best judgement and feel free to consult a Dr if you’re concerned.

Does SMBC crust?

No, Swiss meringue buttercream does not crust or dry out like American buttercream can. That’s why SMBC is excellent for creating the smoothest frosting detail on cakes and perfectly piped (yet still fluffy tasting!) designs.

Is it stable?

Yes, Swiss meringue buttercream is stable at room temperature. Though if eating on a particularly humid day, keep your frosted confections in the refrigerator as close to serving as you can. You can use SMBC under fondant-topped cakes and confections, too.

Can I add food coloring?

Yes and it’s best to tint SMBC with gel food coloring so you aren’t adding a lot of extra liquid. Beat food coloring into the frosting on low speed after you add the vanilla extract and salt.

Can you freeze Swiss meringue buttercream or make it ahead?

Yes. Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, refrigerate it for up to 5 days or freeze up to 3 months. If freezing, store in an airtight container, then thaw it at room temperature on the counter. Once completely at room temperature, about 72°F (22°C), place into the bowl of your stand mixer fitted with a paddle attachment and beat for 2-3 minutes until creamy again. If it separates or curdles, see troubleshooting tips below.

Can I add flavors?

Replace some (about 1 teaspoon) of vanilla extract with 1 teaspoon of another flavor extract such as lemon, coconut, orange, maple, or even 1 teaspoon of espresso powder. Taste, then add a touch more if desired. For potent extracts, like peppermint or almond, replace 1 teaspoon of the vanilla with just 1/2 teaspoon. For chocolate Swiss meringue buttercream, beat 8 ounces of pure melted and slightly cooled chocolate into the buttercream when you add the vanilla and salt. Make sure you’re using pure baking chocolate (the 4 ounce bars) like Baker’s or Ghirardelli brands found in the baking aisle.

Can I make strawberry Swiss meringue buttercream?

Yes! Using a food processor or blender, process 1 cup (about 25g) freeze-dried strawberries into a powdery crumb. You should have around 1/2 cup. If it’s not grinding down fine enough, you can sift it with a fine mesh sieve to rid larger seeds/pieces. Add the strawberry crumb powder when you add the vanilla.

Troubleshooting Swiss Meringue Buttercream

  1. Meringue Won’t Reach Stiff Peaks: Step 4 in the recipe below requires a long period of mixing the cooked egg whites and sugar together into stiff peaks. This mixture (the meringue) will never reach stiff peaks if there was a drop of egg yolk (fat) or grease in the mixture, mixing bowl, or on any tools you are using. Wipe down all of your tools with lemon juice or white vinegar, use an egg separator, and separate and add the egg whites one at a time to the mixing bowl. These are all instructions listed out in the recipe below. It’s also helpful to avoid making this on particularly humid days where there’s extra moisture in the air. If you did all of this and it’s still not reaching stiff peaks, the meringue could be too warm or it needs a break. See next.
  2. My Mixer Needs a Break: By all means, give it a break! Mixers can tire out while beating the cooked egg whites and sugar because this step requires a long period of mixing. If your mixer and its motor needs a break, it’s likely your meringue needs a break too. Stop what you’re doing, remove the whisk attachment (or beaters if you’re using a hand mixer), place the attachment/beaters in the bowl with the meringue, and refrigerate it all (covered or uncovered, doesn’t matter) for 20-30 minutes. This gives your mixer, as well as the meringue and mixing bowl, a chance to cool down. (Important: though it’s best to begin whipping the cooked egg/sugar while it’s still warm, it could simply need a cool break halfway through reaching stiff peaks.)
  3. Buttercream is Soupy/Too Thin: If your mixture has become too thin and soupy after you add the butter, your butter was likely too warm or the meringue was still too warm. Have no fear—this is fixable by bringing down its temperature. Place the entire bowl in the refrigerator (covered or uncovered, doesn’t matter) for 20 minutes to cool down, then return it to the mixer and beat on medium-high speed until thickened. Any longer than this will solidify the butter, so only refrigerate in 20 minute spurts. If it’s still soupy, place back in the refrigerator for longer before re-whipping again.
  4. Buttercream Only Tastes like Butter: The main ingredient, besides egg whites, is butter. Make sure you’re using unsalted butter because salted butter leaves your frosting with an overwhelmingly salty/buttery flavor. Use pure vanilla extract to flavor it and add a pinch of regular table salt. Other flavored extracts work too—see the Ingredients section above.
  5. Buttercream Solidified in the Refrigerator: There’s a lot of butter in this frosting, so if it’s stored in a bowl in the refrigerator, it will solidify into one large mass just like a bowl of cookie dough. Two ways to fix this: sit it on the counter and bring it to room temperature. Once completely at room temperature, about 72°F (22°C), place into the bowl of your stand mixer fitted with a paddle attachment and beat for 2-3 minutes until creamy again. If you don’t have time to wait for it to come to room temperature or if your home isn’t warm enough, follow the same instructions as #3 in this list (Buttercream is Curdled/Too Thick). Placing over gentle heat will melt the edges and when whipped, the melty edges and solid center will come together into 1 smooth frosting.
  6. Buttercream is Curdled/Too Thick: If your meringue has separated, curdled, or is too thick at any point after you mix in all of the butter, just keep beating because it will eventually come together. If it’s only getting thicker and chunkier, there’s a quick fix—and it’s my favorite. Place the mixture in your heat-proof bowl back over a pot of 2 inches of simmering water. Without stirring, let the edges of the meringue warm up and become liquid (the center of the meringue will still be solid), about 1-2 minutes. Remove from heat and return to the mixer. Beat meringue on low speed for 30 seconds, then switch to medium-high speed and beat until smooth, about 2 minutes. I have to do this 75% of the time, but I LOVE it because partially melting the SMBC then re-whipping actually creates a creamier frosting.

Pictured below: Curdled buttercream. See above.

curdled thick swiss meringue buttercream disaster

I know it seems complicated, but as long as you remain patient, read through this post, watch the video, prepare yourself by reviewing the recipe before beginning, you will be rewarded with the most luscious, not-overly-sweet frosting ever.

How to Use It:

cupcakes with Swiss meringue buttercream
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swiss meringue buttercream

Swiss Meringue Buttercream

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.7 from 493 reviews
  • Author: Sally McKenney
  • Prep Time: 25 minutes
  • Cook Time: 5 minutes
  • Total Time: 30 minutes
  • Yield: 5 cups
  • Category: Frosting
  • Method: Whipping
  • Cuisine: European
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Description

This is vanilla Swiss Meringue Buttercream perfection. It’s the ideal balance of sweet and creamy, without being as cloyingly sugary as American buttercream. (This is a far cry from how sweet that is!) Thick, sturdy, and perfectly pipe-able. This in-depth recipe sets you up for success on your 1st try.


Ingredients

  • 6 large egg whites (approximately 180g)
  • 2 cups (400g) granulated sugar
  • 1 and 1/2 cups (340g) unsalted butter, softened but still cool and cut into Tbsp size pieces (*see note*)
  • 2 teaspoons pure vanilla extract
  • 1/8 teaspoon salt


Instructions

  1. Watch the video tutorial above, review the troubleshooting tips, and read the recipe in full before beginning. Make sure all the tools you are using are completely cleaned, dried, and grease-free. A quick wipe with a little lemon juice or white vinegar is very helpful.
  2. Separate the eggs: If you haven’t done so yet, separate the eggs first. Separate 1 egg white in a small bowl, then place the egg white in your heatproof mixing bowl. Repeat with the remaining egg whites. This way, if a yolk breaks in one of them, you don’t waste the whole batch.
  3. Whisk sugar into the egg whites, then set the bowl over a saucepan filled with just two inches of simmering water over medium heat. Do not let the bottom of the egg whites bowl touch the water. Whisk the whites and sugar constantly until sugar is dissolved and mixture has thinned out, about 4 minutes. The mixture will be thick and tacky at first, then thin out and be frothy white on top. To test that it’s ready, you can use your finger or an instant read thermometer. Lightly and quickly dip your finger (it’s very hot, be careful) and rub the mixture between your thumb and finger. You shouldn’t feel any sugar granules. If using a thermometer, the temperature should read 160°F (71°C).
  4. No need to let it cool down to start this next step—it’s important to begin mixing while it is still warm. Transfer mixture to the bowl of a stand mixer fitted with a whisk attachment (if you aren’t already using the metal bowl that comes with it). You can use a hand mixer instead, but this step takes awhile and your arm tires quickly. On medium-high speed, beat the mixture until stiff glossy peaks form and the meringue is no longer warm to the touch, at least 10-15 minutes. On particularly humid days, this has taken me up to 17-18 minutes. If it’s still not reaching stiff peaks, stop the mixer, place the bowl—uncovered—in the refrigerator for 10 minutes, then return to the mixer and continue beating until stiff peaks form. (This has always worked for me when it’s taking forever to reach stiff peaks.)
  5. If the bowl and meringue still feel warm, wait until both cool to room temperature (around 70°F (21°C)) before adding the butter in the next step. Feel free to place it in the refrigerator. A warm bowl and meringue will melt the butter.
  6. Switch the stand mixer to the paddle attachment. On medium-high speed, add the butter 1 Tablespoon at a time. Wait for the butter to fully mix in before adding the next Tablespoon. After all the butter has been added, turn the mixer down to medium speed and fully beat in the vanilla and salt, about 30 seconds.
  7. Your Swiss meringue buttercream should be thick, creamy, and silky smooth and is ready to use on any cake, cupcake, or other confection.
  8. Too Thick or Too Thin: If your meringue has separated, curdled, or is too thick at any point after you mix in all of the butter, place the mixture in your heat-proof bowl back over a pot of 2 inches of simmering water. Without stirring, let the edges of the meringue warm up and become liquid (the center of the meringue will still be solid), about 1-2 minutes. Remove from heat and return to the mixer. Beat meringue on low speed for 30 seconds, then switch to medium-high speed and beat until smooth, about 2 minutes. Works every time. If your mixture has become too thin and soupy after you add the butter, place the entire bowl in the refrigerator (covered or uncovered, doesn’t matter) for 20 minutes to cool down, then return it to the mixer and beat on medium-high speed until thickened. Any longer than this will solidify the butter, so only refrigerate in 20 minute spurts. If it’s still soupy, place back in the refrigerator for longer before re-whipping again. More troubleshooting tips in the post above.

Notes

  1. Make-Ahead, Storing, & Freezing Instructions: Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, refrigerate it for up to 5 days or freeze up to 3 months. If freezing, store in an airtight container, then thaw it at room temperature on the counter. Once completely at room temperature, about 72°F (22°C), place into the bowl of your stand mixer fitted with a paddle attachment and beat for 2-3 minutes until creamy again. If it separates or curdles, see step 8.
  2. Special Tools (affiliate links): Electric Mixer (Handheld or Stand) | Instant Read Thermometer | Egg White Separator | Whisk | Double Boiler
  3. Yield: This recipe yields about 5 cups of frosting, which is enough to fill and frost a two layer 9-inch cake with a generous amount, to fill and frost a three layer 9-inch cake with just enough frosting, to lightly frost 2 dozen cupcakes, to heavily frost 1 dozen cupcakes (I had just enough for the huge swirls on 12 of the pictured cupcakes), or a 9×13 inch sheet cake (with some frosting leftover).
  4. Egg Whites: For best success, I recommend using fresh eggs instead of carton egg whites. Here are all my recipes using leftover egg yolks. Eggs separate much easier when they’re cold. Separate the egg whites one at a time and place the egg white into a large heat-proof mixing bowl (or a double boiler or the metal mixing bowl from your stand mixer) before separating the next. This way, if a yolk breaks in one of them, you don’t waste the whole batch.
  5. There’s almost always a way to fix “ruined” Swiss Meringue Buttercream and it usually has to do with temperature. See step 8 as well as my troubleshooting tips in the post above.
  6. Butter: This buttercream will thin out and become liquid-y if the butter is too warm. Make sure you’re using butter that is slightly cooler than proper room temperature butter. Remove butter from the refrigerator and set it out for just 30-40 minutes before you need to add it to the meringue. Sometimes meringue takes longer than usual or it needs a break (see Troubleshooting above) and in that case, you should place the butter back into the refrigerator for a few minutes so it doesn’t get too warm sitting out. The butter should be cool to the touch. For accuracy, I recommend using an instant read thermometer. Butter should be 60°F (16°C).
  7. Flavors & Colors: For flavor ideas including chocolate, see my Can I add flavors? FAQ above. For coloring, it’s best to tint this frosting with gel food coloring so you aren’t adding a lot of extra liquid. Beat food coloring into the frosting on low speed after you add the vanilla extract and salt.
  8. Half or Larger Batch: You can halve this recipe. The egg white/sugar mixture won’t take as long to cook and the meringue won’t take as long to reach stiff peaks. I do not recommend making larger batches at a time because it will quickly overcrowd and wear out your mixer. If you need more batches, make them all separately.

Adapted from Martha Stewart. I found it needed less butter, 1 more egg white, and more sugar in order to stabilize properly.

sally mckenney headshot purple shirt.
About the Author

Sally McKenney

Sally McKenney is a baker, food photographer, and New York Times best-selling author. Her kitchen-tested recipes and step-by-step tutorials have given millions of readers the knowledge and confidence to bake from scratch. Sally’s work has been featured on TODAY, Good Morning America, Taste of Home, People, and more.

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Reader Comments and Reviews

  1. Wanda G. says:
    September 14, 2024

    Followed the recipe exactly. Although silky and delicious, mine was a bit soft and maybe starting to curdle. Going to work with it following tips of brief refrigeration so I can get my cake iced.

    Reply
  2. Lisa says:
    September 8, 2024

    Perfect recipe! I followed the directions exactly and added melted chocolate. Smooth & silky.

    Reply
  3. Kae_T says:
    September 8, 2024

    I would suppose I made it right? It tastes fine, but it simply will not frost smoothly on the cake. No idea what could be wrong?? I made it 3x and each batch came out the same so I honestly am stuck.

    Reply
  4. Carmen Hartigan says:
    September 6, 2024

    Discouraged! The sugar never fully dissolved. The sides of the mixing bowl, the egg started to burn! I think I had it I. There way too long and it barely hit 158. Then I put it in another bowl so I could clean the scorched sides of the bowl. I weigh my sugar so it was exactly 2 cups and 6 whites. The egg is grainy! I beat it into stiff peaks. It seemed more like marshmallow. Adding the butter made it shine and thin. Popped it in the fridge and we’ll see but it’s looking ABC for me today because I’ll be tossing this out I’m sure!

    Reply
    1. Joni Roussel says:
      November 14, 2024

      I’m having the same trouble. I live in a humid area and we’re on Batch 2. Icing is currently in fridge and we’ll see what happens in 20-30 min. Ughh

      Reply
  5. Amidala says:
    September 4, 2024

    I love it

    Reply
    1. Tori O'Connor says:
      December 7, 2024

      This recipe was a big hit with family and friends at a party. I would like to follow the FAQ for chocolate. It says to use pure chocolate, does that mean unsweetened?

      Reply
  6. Angie O. says:
    September 2, 2024

    I did the chocolate. It worked perfectly without any issues! Best frosting ever.

    Reply
  7. Heather says:
    September 2, 2024

    Hi Sally! Thank you for the great recipe. Question: if I’m decorating my cake on Thursday and it’s not getting served until Saturday, is it best to leave at room temp or to refrigerate it?

    Reply
    1. Michelle @ Sally's Baking says:
      September 2, 2024

      Hi Heather, Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, refrigerate it for up to 5 days.

      Reply
  8. Marie Hamilton says:
    September 1, 2024

    Second attempt but with a stand mixer instead of a hand mixer and I finally got stiff peaks after 35 minutes! Thank you!!!!

    Reply
  9. Sally myers says:
    August 31, 2024

    Can you get your website without all the commercials?
    It keeps going back to the beginning and making me start over
    Very frustrated because you are my favorite baker!,,

    Reply
  10. Margaret says:
    August 26, 2024

    Hi..can I add a printed sheet of edible image on top of SMBC.If yes ,how long will edible printed image stay good without the colors smudging. Thk u.

    Reply
    1. Lexi @ Sally's Baking says:
      August 26, 2024

      Hi Margaret, we haven’t tried using edible images on top of this frosting—so sorry we can’t be of more help here! Let us know if you do give it a try.

      Reply
  11. Lauren says:
    August 20, 2024

    Love this recipe and have made it lots of times with success!! I was just wondering, if I wanted to make this with brown sugar, could I do a direct substitution? Or would I need to adjust ratios?

    Reply
    1. Lexi @ Sally's Baking says:
      August 20, 2024

      Hi Lauren, Some readers have used brown sugar, same amount, and it has worked wonderfully. We haven’t personally tested it yet, though, so please do let us know how it goes for you!

      Reply
  12. Kathi says:
    August 18, 2024

    I love SMBC and decided to try this recipe/method. I also love anything by SBA, so I figured I couldn’t go wrong. My meringue is currently in the refrigerator cooling down to room temperature. I got stiff peaks, but the temperature was still over 100°. I’m checking it every 5 minutes and the last I checked it was still at 80° after whipping some more. So far it’s been chilling in the refrigerator for 20 minutes. I hope 30 minutes or more is normal!

    Reply
    1. Kathi says:
      August 19, 2024

      Changing my rating to 5. I had to put it in the refrigerator longer to get it down to 70 and it was fine. It was warm here so extra refrigeration I guess was necessary!

      Reply
  13. Tejashree says:
    August 17, 2024

    Hi! Will this recipe be enough to cover a 3 layer 9 inch cake?

    Reply
    1. Michelle @ Sally's Baking says:
      August 18, 2024

      Hi Tejashree, This recipe yields about 5 cups of frosting, which is enough to fill and frost a two layer 9-inch cake with a generous amount, to fill and frost a three layer 9-inch cake with just enough frosting.

      Reply
  14. Genie says:
    August 8, 2024

    Ive tried revipe twice and both time i could not get the sugar in the egg whites to melt and get smooth. What am i doing wtong.!

    Reply
    1. Lexi @ Sally's Baking says:
      August 8, 2024

      Hi Genie, In step three, after you mix the eggs and sugar together, you may not have cooked the mixture long enough. If you wish to try again you can also try using ultrafine sugar (same amount) or even run your sugar though a blender to make your own ultrafine sugar which should help it dissolve even easier. Hope this helps!

      Reply
  15. Lynn says:
    August 7, 2024

    This was just the best frosting and so easy to spread. I save egg whites in the freezer that I don’t use immediately. I thawed and used in this recipe and it worked! I liked that this wasn’t too sweet.

    Reply
  16. Jackie says:
    August 5, 2024

    I’ve made this recipe in the past with no issue but somehow this weekend was a disaster. I made sure everything was room temperature, the butter was exactly 60 degrees. I could not get stiff peaks, I tried mixing it at medium speed for 15 minutes, tried putting it in the fridge for 3- 10 minute stints, even added an ice bath but made sure the water never touched the ingredients. It only got more soupy. I got the temp to 70 degrees farenheight and added the butter but the butter didn’t fully incorporate. I then added 8 oz of melts but cooled chocolate. It was too sweet and the texture was off. Wish I could figure out where i went wrong.

    Reply
  17. Bec J says:
    August 3, 2024

    So I tried this recipe in Jan for my daughter’s birthday cake. This was in the height of Aussie summer and I only had a hand mixer. Was a very frustrating night and it just didn’t work. Got myself kitchen aid after that and just did this last night for my son’s birthday cake. Complete success! Followed the troubleshooting tip after it curdled and I now have silky smooth frosting ready to pipe. It’s winter here now too which makes the difference. Just don’t try and do meringue in summer.

    Reply
  18. Bonnie says:
    August 3, 2024

    Hi Sally! I’m going to be making a wedding cake and the bride wants a thick satin ribbon tied around the bottom part of the top tier. Since the swiss meringue buttercream doesn’t crust, would you recommend american buttercream or do you think I could make this swiss meringue buttercream work? I’m nervous the SMBC will get smudged and marked up when I go to tie the ribbon but it seems like it would look so beautiful and smooth on a wedding cake! Would love your thoughts as I’ve never worked with SMBC before! Thanks!

    Reply
    1. Lexi @ Sally's Baking says:
      August 5, 2024

      Hi Bonnie, great question! We haven’t done exactly that before, but your suggestion is probably correct. An American buttercream may be a better bet for the portion of the cake where the satin ribbon will be tied. We fear the SMBC may smudge like you mention. Let us know what you decide to try!

      Reply
  19. Renee Friesen says:
    August 2, 2024

    I tried 3 swiss meringue buttercream recipes and this one is a definite winner!! Easy, excellent piping quality and tastes just the right amount of sweetness. It’s a keeper!!

    Reply
  20. Margaret says:
    July 31, 2024

    I’m giving this recipe five stars because I’m pretty sure I made it correctly and I can’t find any fault with the method… but I really am not fond of the finished product. Even though I did what was suggested and used unsalted butter, with just a pinch of salt, that’s all we could taste, and the mouthfeel of it was like eating pure whipped butter. I have to think maybe I went wrong somewhere. Should it have tasted like that? I had left the cake out at room temperature until we were ready to eat it. Should I have refrigerated it, and would that have helped? (I live in south Louisiana, so my room temperature may be warmer/more humid than average.)

    Reply
    1. Lexi @ Sally's Baking says:
      August 1, 2024

      Hi Margaret, thank you so much for giving this a try! What kind of butter did you use? Some brands of butter (or European based butters) have a more overwhelmingly salty/buttery flavor. Be sure to also use pure vanilla extract to flavor it. It’s possible that the warmth/humidity warmed up your frosting more and gave it a bit more of a buttery taste. Hope this helps and thank you again for giving it a go!

      Reply
    2. Jennifer says:
      August 2, 2024

      I found the very same thing with the buttery taste. It is a bit disappointing. I added an extra tsp of vanilla and another 1/8 tsp salt, and while it help deaden the butter flavour some, it is still rather buttery tasting. Really wish I knew what I did wrong.

      Reply
      1. Moran c says:
        August 14, 2024

        Hey , does this Swiss buttercream good for cover a cake with fondant ?

      2. Lexi @ Sally's Baking says:
        August 14, 2024

        Hi Moran, Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, we recommend refrigerating it for up to 5 days. We don’t use fondant often, but it’s typically best to store fondant at room temperature. Hope this helps!

  21. Shelly says:
    July 29, 2024

    For chocolate, unsweetened or 60% baking bar? I’m making it this week, and can’t wait. Also, thank you for including recipes that use the yolks-that’s super helpful.

    Reply
    1. Lexi @ Sally's Baking says:
      July 29, 2024

      Hi Shelly, we’d recommend a semi-sweet baking chocolate bar. You can use bittersweet if you prefer a much darker flavor. Hope you enjoy the buttercream!

      Reply
  22. Melissa Tee says:
    July 26, 2024

    There’s 2 hours of my life I’m never getting back. I’m sure that some people are able to make this, but don’t fall for the “it’s not that difficult” line. It is difficult. You will be frustrated. You probably won’t succeed the first time. This is just way too fussy for me and if you started the recipe with some honesty I would have never done it to begin with. False hope is just a waste of my time and ingredients.

    Reply
    1. Nanasbakes says:
      August 27, 2024

      My mom always told me if you don’t have anything nice to say, don’t say anything at all! She took time out of her life to try and help others, if you would try that, you wouldn’t have time to be so rude.

      Reply
  23. Marko says:
    July 24, 2024

    If i frost a cake with this buttercream a day before and then put the cake in the refrigerator, what will the buttercream feel like the next day when i serve it?
    The cake will be served the next day in the early afternoon. Will the frosting soften and become creamy again on itself, if i take it out of the fridge ahead of time, let’s say in the morning?
    Do you have any advice on how to deal with this. Frosting the cake on the same day is not an option.

    Reply
    1. Lexi @ Sally's Baking says:
      July 24, 2024

      Hi Marko, you can definitely frost a cake with this frosting one day in advance, store in the refrigerator, and then bring to room temperature again before serving.

      Reply
  24. Helene says:
    July 21, 2024

    I’ve previously used John Kanell’s recipe, but heard great things about this one and decided to give it a go. Followed every instruction to a tee, but no matter what i did, it never stiffened or peaked. I even tried again. Same issue. Both times i made sure there were no grease, i double washed everything with dish soap and rubbed it in white vinegar. No yolk got into the whites. I used fresh eggs. I tried putting it in the fridge but it didn’t help. Now i’m extremely dissapointed and discouraged, i never want to try SMBC ever again, and on top of it all, i did not even like the taste. So this was all just a waste of time and ingrediants.

    Reply
    1. Sally @ Sally's Baking says:
      July 22, 2024

      Hi Helene, I’m sorry you had trouble with this recipe. If it hot or humid where you live? Because I’ve experienced a similar issue when making this in the summertime, and felt defeated when it just wouldn’t reach stiff peaks. It took almost an hour of mixing, on and off, to give my mixer a break. IF you ever want to try again, see if letting the egg whites cool completely off the stove before whipping. That can help.

      Reply
  25. Josalyn says:
    July 21, 2024

    So delicious!!! This is so simple to make and it taste absolutely amazing. This is my first time ever making swiss meringue and I will never go back to american buttercream. I wad able to follow the recipe just fine.(I followed along with the video since it was my first time making it) and I didn’t have any issues at all. If you’re looking for a good swiss meringue recipe then this is definitely the one!

    Reply
  26. Panther says:
    July 15, 2024

    How much frosting would I need to cover a 9 inch round cake with star-tip dots?

    Reply
    1. Stephanie @ Sally's Baking says:
      July 17, 2024

      Hi Panther, The recipe as written should be enough for a 2 layer 9-inch cake, but you can always make more just to be on the safe side. If you have leftover buttercream, see the recipe note for Make-Ahead, Storing, & Freezing Instructions.

      Reply
  27. Sarah says:
    July 14, 2024

    I really love this recipe and have made it several times. However, do you think it will hold up on a hot day (28 degrees C) outside ? I saw a recipe where they had beaten the butter before adding the meringue to it, and said it was more stable in the heat doing it that way. What do you think ? Thanks for any advice !

    Reply
    1. Stephanie @ Sally's Baking says:
      July 15, 2024

      Hi Sarah, On a particularly hot or humid day you’ll want to keep your frosted cake refrigerated as close to serving as possible. We have not tried beating the butter first, but let us know if you try it and it works!

      Reply
  28. Kay says:
    July 12, 2024

    Finally, it whipped together! After 3 tries, and living in the DEEP, HOT, HUMID south- I made it! My last try I whipped, for what felt like forever, still no peaks! Refrigerated then whipped, soupy! Finally, I put it back on the heat then whipped for 10 minutes- wah lah, perfect! This was a total of 60 minutes from start to finish, I’m using a hand mixer so pray for my arm ! Thanks for the troubleshooting tips!

    Reply
    1. Katie Shaffer says:
      July 24, 2024

      To flavor it chocolate, should I use semi sweet chocolate baking bar?

      Reply
      1. Lexi @ Sally's Baking says:
        July 24, 2024

        Hi Katie, For chocolate Swiss meringue buttercream, beat 8 ounces of pure melted and slightly cooled chocolate into the buttercream when you add the vanilla and salt. Make sure you’re using pure baking chocolate (the 4 ounce bars) like Baker’s or Ghirardelli brands found in the baking aisle.

  29. Becca says:
    July 8, 2024

    The instructions and recipe are so easy to follow! I’ve made French buttercream before but this was my first attempt at Swiss. To me it tastes more like marshmallow fluff than I was expecting. Is this just what it tastes like or did I do something wrong?

    Reply
    1. Trina @ Sally's Baking says:
      July 8, 2024

      Hi Becca, Swiss Meringue Buttercream and Homemade Marshmallow Creme both start with egg whites and sugar (meringue), so it makes sense that this recipe would remind you of marshmallow fluff!

      Reply
  30. Jacqui says:
    July 5, 2024

    I’ve made this recipe twice , I love the texture but I still can’t seem to get it smooth on the cake.

    Reply
    1. Jennifer says:
      August 2, 2024

      This was my first time to try Swiss meringue buttercream. I watched the video and read through everything beforehand as suggested. While the final product looked good, it tasted like butter. I even added an extra teaspoon of vanilla and 1/8 tsp extra salt and while that deadened the butter flavour some, it still came through rather strongly. Any idea what I might’ve done wrong?

      Reply
      1. Sally @ Sally's Baking says:
        August 8, 2024

        Hi Jennifer, I don’t think you really did anything wrong. It’s buttercream and will have a strong butter flavor. Feel free to add another flavor, such as a little almond extract which could help mask some of the butter flavor.