Silky smooth vegan Swiss meringue buttercream will soon be your go-to icing for all your cake needs. This light and fluffy icing will make any cake shine.
If this is your first time making any type of Swiss meringue buttercream, I recommend that you read the whole post, some parts might be tricky. If you are a pro, feel free to jump straight to the recipe!
Classic Swiss Meringue Buttercream
Also known as “SMBC”, Swiss meringue buttercream is usually an icing used in bakeries to smoothly ice cakes or fill pastries. Traditionally made with egg whites and butter, this vegan version will have everyone fooled. It is dairy-free, egg-free and naturally gluten-free.
I love Swiss meringue buttercream because it is not too sweet and it is very versatile
- It is perfect for filling macarons and icing cakes
- Gives a smoother finish than American buttercream
- Is great is pastries and entremets like Opera cake
- Takes color beautifully
- Easily pipable and is great at keeping its shape
- Doesn’t “crust” as much as American buttercream
Smoothest Icing
When I was a budding baker, I always found that my buttercream – an American-style buttercream – was always grainier than what I could find at my local bakery. I tried ermine frosting, whipped ganaches and stabilized whipped cream and never found an icing that was quite right.
This is before I started pastry school and learned about Swiss meringue buttercream. Meringue buttercreams, either Italian or swiss, are some of the smoothest icing out there. It is actually the only type of buttercream that we learned in pastry school and pretty much the only ones I use at home nowadays.
But I do have to say that I do have a preference for swiss meringue buttercream because it is so much easier to make than Italian meringue buttercream. You get to skip the risks of working with hot syrup, and hoping you didn’t ruin your meringue because you added that syrup too quickly.
Vegan Swiss meringue buttercream also has the advantage of eliminating the risk of overcooking the egg whites during the cooking process, which can happen with regular swiss meringue buttercream
Ingredients
Aquafaba
Usually made with egg whites, this vegan Swiss meringue recipe uses aquafaba, which is the liquid found in a can of beans. Certain brands of beans will naturally have a thicker aquafaba while others might have a very thin liquid. If you end up with a thinner aquafaba, you will need to reduce it to concentrate the protein found in the liquid to get that stiff peak once you start whipping up your meringue.
Personally, I like to use salt-free beans for this, as it has more of a neutral taste. Chickpeas and cannellini beans are some of my favorites, but I’ve whipped up vegan meringues made of pinto bean or red kidney beans aquafaba in the past without problems.
Alternative: Versawhip 600K
If you feel like experimenting a bit, or are simply sick of eating beans, try using Versawhip 600K instead to make your meringue.
I found that 2.8 g (1 ½ tsp) of Versawhip well mixed with 190g (¾ cup) of water works well in this recipe to replace aquafaba. Mix the water and Versawhip together and use as you would aquafaba.
Will it taste like beans?
No, meringue made out of aquafaba does not taste like beans. However, depending on the brand you get, it might taste slightly saltier.
To get that perfect meringue, check out my vegan meringue troubleshooting guide!
Vegan Butter
My favorite vegan butter for this recipe is Becel Unsalted Plant-Based Bricks. I love this product because it:
- Is cheaper than other brands
- Taste great!
- Stay firm like regular butter. No more soft margarine
- Comes in salted and unsalted. This is actually the biggest reason why I love it!
If you can’t get your hands on Becel plant-based bricks, Hearth Balance sticks (not the tub) will do but will give a slightly saltier result. And while I haven't tried it myself, I think the country crock plant-based vegan alternative should also work with this recipe.
While shortening does give a more neutral taste and whiter color, I do not recommend it in this recipe as it does leave an unpleasant mouthfeel ( a bit like a coat of fat in the inside of your mouth) and you would miss that wonderful buttery taste. Using something like vegan butter instead of shortening also means that the buttercream will firm up in the refrigerator, which is great when decorating cakes.
Stand mixer
Most recipes I share can usually be done with a hand-held mixer but in the case of this vegan swiss meringue buttercream – or when making any kind of vegan meringue really – I highly recommend using a stand mixer.
This is because vegan meringue made with aquafaba is usually whipped for a long period of time to reach those gorgeously strong stiff peaks and a hand-held mixer’s motor is simply not strong enough. The shape of the whisk also helps get that meringue whip up, which can be harder with regular double beaters.
Is my meringue whipped enough?
So you want to reach a stiff peak meringue for this recipe. Here are some indications that your meringue has reached that stage.
- The whisk is leaving traces in the bowl of meringue. When you look closely at the meringue, you also do not see any bubbles.
- The biggest indication your meringue is ready is when the whisk is whipping, the meringue starts to accumulate around the whisk and is riding up the whisk. If you stop your stand mixer, it looks like you have a “bump” in the middle of your bowl of meringue.
- When you see that the meringue wants to climb up the whisk, take the whisk and lift it up from the meringue completely. If a lot of meringue stays on top of the whisk ( ½ cup to 1 cup) when you flip it upside down and the peak stands straight up, your meringue is ready. If you see a peak that leans slightly and only a small amount of meringue wants to stay on the whisk, continue whisking for 3 to 5 minutes.
TIP: Your bowl needs to be very clean and completely free of fat, which could stop your meringue from wiping up properly.
My buttercream curdled?!?!
1.When making the icing
The first time people make Swiss meringue buttercream, they often think they fudged up and curdled their buttercream. This is completely normal. This type of buttercream often goes through a “curdled” stage right after all the butter is incorporated.
This is because the butter still hasn't completely mixed into the meringue. After all, butter can have trouble emulsifying with liquids like aquafaba. This might also be caused by the butter being too cold when you are trying to add it to your meringue.
To fix this issue
Continue whipping for up to 10 minutes. The vegan Swiss meringue buttercream should start to slowly come together again. This will also make your buttercream light and fluffy.
If you still see chunks of whole butter pieces in the buttercream, this is because your ingredients were too cold. Warm up the buttercream slightly by swiping a blowtorch on the outside of your stand mixer bowl (only if it is made of metal), making sure never to stay too long at the same spot, as it could damage the bowl of your stand mixer. Alternatively, you could place your bowl with the buttercream on a bain-marie for a couple seconds on and off while continuing to mix.
The buttercream closer to the edge of your bowl will slightly melt and will warm up the rest of the buttercream. That bit of melted buttercream will also help with emulsification. In pastry school, we actually always used the blowtorch technique while whipping up our buttercream for those pesky 10 minutes (or more!) because we were not patient enough to get the butter to that perfectly soft but unmelted texture.
You should let your butter come up to room temperature until you are able to leave a deep imprint with your thumb into the vegan butter without a problem. I often simply leave my bloc of vegan butter overnight on the counter.
2.When coloring it
If the buttercream looks like it split while you were adding color – especially if you added lots of it – place the buttercream in the refrigerator until it firms back up again. Then re-whip the vegan swiss buttercream on high until it comes back together. You might also try to add a spoonful of plain buttercream to help the emulsification along.
Also make sure you are using gel food colorants, since they are more concentrated and are better at colouring icing without thinning it.
Refrigerating Swiss meringue buttercream
Vegan swiss meringue buttercream can be refrigerated for up to 1 week. To bring it back to its light and airy consistency you will need to bring the buttercream to room temperature slowly before wiping the SMBC on medium-high until it becomes light and fluffy again. You can also use the blowtorch technique mentioned previously to bring it back together and re-emulsion it together.
How to get white icing
Because of the high butter content, buttercreams tend to be slightly yellowish. Here are some tips and tricks to get a snow white icing.
- Most people under-whip their icing. The more your whip the whiter the icing will be due to the air incorporated. It also makes a buttercream that tastes less like straight-up butter. Aim for a good 10 minutes of whipping.
- Add 1 drop of violet food coloring. It will counterbalance the yellow color. Try to get just the tip of a toothpick into the food colo to get the proper amount and not end up with a Barney-colored icing.
- Try white titanium dioxide. Sometimes named white food coloring, titanium dioxide will whiten any icing. you can find this product in cake supply shops next to the food coloring.
Recipe
Vegan Aquafaba Swiss Meringue Buttercream
Ingredients
- 180g (⅔ cup) previously reduced aquafaba , see step 1
- 350g (1 ¾ cup) white granulated sugar
- ¼ teaspoon cream of tartar
- ⅛ teaspoon xanthan gum , optional but recommended
- 454g (2 cups or 1 pound) room temperature vegan unsalted butter cut into 1-inch cubes , I recommend using Becel plant-based bricks
- 1 teaspoon vanilla extract or vanilla bean paste ,adjust to taste
Instructions
- As needed, reduce your aquafaba to get a slightly slimy consistency. In a small saucepan, simmer the aquafaba on low heat until it has reduced by a third to a half. If your aquafaba is thick straight from the can, feel free to skip this step.
- In a saucepan, mix the aquafaba and sugar together and bring to a boil over medium heat. Transfer the aquafaba into a container and let the preparation cool down until it is at room temperature. This is also a great time to get your vegan butter out of the fridge to let it come up to room temperature.
- In the bowl of a stand mixer, add the aquafaba, cream of tartar, and xanthan gum. Using the whisk, whip up the aquafaba on high until you reach stiff peaks. This will take between 7 and 10 minutes.
- Slowly add the vanilla and the butter, cube by cube, waiting between each addition that the previous cube is almost completely incorporated before adding the next one.
- Whip the vegan swiss meringue buttercream for 10 minutes, or until it is light in color and has a subtle butter taste. Optional: As needed, swipe a blowtorch on the outside of the bowl of your stand mixer (if it is made of metal) for 20 to 30 seconds at a time, keeping the flame moving constantly if you have trouble incorporating the butter. This should be gentle heat and the butter should not melt.
- Change the whisk for the paddle attachment and whip the swiss meringue buttercream on low for 2 to 3 minutes to remove any air bubbles. You can also press the buttercream against the side of the bowl with the help of a silicone spatula to get rid of any large air bubbles.
- Color and use as needed, or refrigerate in an airtight container for up to 1 week. Enjoy!
Notes
Did you try this vegan buttercream recipe?
Don’t be shy and let me know how it went! Leave me a comment below and share a picture on Instagram !
Isadora
Thank you so much for this recipe! I I want to make this to frost my birthday cake, but here where I live the only vegan butters available are those in tubs (and margarine). Vegan butter sticks unfortunately don't exist here.
Is it possible to make this recipe using margarine or vegan butter from a tub? Every recipe I saw asked for sticks 🙁
Raspbelyse
No sorry. It would be too soft, especially for a stacked cake and would melt quickly. Have you thought about making a whipped vegan ganache or an American-style buttercream?
Kathy
Hi thanks for your recipe - trying it today.
One comment I wanted to pass on - white granulated sugar is not vegan as it is processed using bone char. If truly vegan product is desired, organic cane sugar should be used.
Planning on using it for a wedding cake - it will be refrigerated as long as possible until displayed. What would you give as the outside length of time this icing will hold out at room temp (assuming reasonable ambient conditions - 70 - 80F?
Raspbelyse
Good point! I mention this in my recent recipes, but I live in Québec where all granulated white sugars are vegan since they come from beets. So yes, look out for organic cane sugar or beet sugar (it doesn't have to be organic) for vegan sugar that is not processed with bone char.
For the wedding cake, 70 to 80 F is actually quite high for a wedding cake. Dairy butter melts at 82 F and vegan butter often has an even lower melting point. If the cake is away from direct sunlight, I think it should be good for 3 to 4 hours if it was very cold when it was pulled from the refrigerator. After that, the buttercream might sweat and become softer which can make the layers shift a bit. Of course, it also depends on a lot of other variables like the size of the cake, the internal structure, the humidity, etc. You could also try using a mix of half vegan butter and half high-ratio shortening since shortening has a higher melting point (but a more disappointing taste).
Best of luck with your wedding cake baking!
Deb
HI,
I only need to replace egg whites and can use normal dairy butter. Would i still need to use Xanthan gum?
Raspbelyse
Yes you would still need to use the xanthan gum. The xanthan is a stabilizer for the aquafaba which replaces the egg whites in this recipe. However, I have had some success with making this recipe without xanthan, but there is a higher risk that the meringue wont want to whip properly or of the buttercream leaking some liquids if you store it for an extended period of time.
Lea
I couldn’t get stiff peaks to form even with very reduced aquafaba and xanthan gum. It was like a pourable marshmallow fluff. I tried chilling it, doubled the cream of tartar, nothing worked. Finally I just added the cubes of butter and it immediately got structure and turned out great! A slight tang from the excess cream of tartar. Tasted a bit like cool whip actually! You really do need to add the butter in small cubes and wait until they are worked in before adding more. I got impatient and added a few rapidly and I thought it split. I just whipped it for a while and the proper texture came back. It was a hit with everyone and they all normally eat dairy.
Daniel
Just a note to say that I made this with cannellini aquafaba, and I couldn't manage to get stiff peaks. Instead I had a somewhat runny marshmallow cream. But, I decided to go for it anyway, and it actually came together pretty well nonetheless! Maybe stiff peaks would have made it a bit more airy (this is my first time through, so I can't really say how it "should" be), but it looks like this method is robust enough to work with a less-stiff meringue.
Also, lacking a blowtorch, I just used a hairdryer and it worked pretty well to encourage the butter along.
Nat
Hello! I’m curious how you would go about making this chocolate? My preference is using cocoa if possible as I can’t always find vegan chocolate.
Many thanks!!
Raspbelyse
Idd deffinitly use sifted cacao powder. I recomended mixing the cocoa butter with the butter first, set it aside and then start the recipe. Start with 1/4 cup and adjust from there.
amalija
This is wonderful advice (using powder, and mixing the cocoa powder with the butter first)! I must have made five different vegan chocolate meringue buttercreams this week and I kept running into different issues until I finally figured out what was ideal. I am so happy to have found your blog and I admire your knowledge. I can't wait to try more of your recipes.
Raspbelyse
Awesome! Happy to hear it.
Chrystle
I was surprised by how much the aquafaba and sugar mixture had whipped up into a meringue but like others, I could not get it to stiff peaks so the ending frosting wasn't as stable. I also used hearth balance bc I couldn't find becel and it does have a salty flavor. However,
it was still pretty light and fluffy. I'm excited to try this again to get the technique correct.
Raspbelyse
If you have a stand mixer, I highly recommend using it for this recipe. WIshing you the best ton your next tries.
Nat
I am so excited to try this. I am wondering about it being left out at room temp. Does it hold up like classic SMBC? Safety wise could it stay on a counter for 2/3 days?
Thank you for sharing!
Raspbelyse
It actually hold up exactly like non vegan SMBC but its not recommended to leave any SMBC at room temperature for health and safety reasons. Its best to keep it in the refrigerator ( especially if it’s hot out) and to rewhip it while warming the outside of the ( metalic) bowl with a blowtorch to bring it back together or leave it at room temperature for 2 hours before rewhipping it
Shashi
Hi Raspbelyse
Thanks so much for this recipe. It's amazing.
I tried it for the first time and it worked incredibly well.
Raspbelyse
Awesome!
R
Followed all instructions to a T… the merengue never reached stiff peaks and reading a few other of the comments I went ahead and added the butter and now I have 20 dollars worth of liquid garbage. Why this recipe has 5 stars in beyond me.
Raspbelyse
This recipe does need a stiff meringue before adding the butter so this is where the recipe went wrong. There are multiple reasons why aquafaba might not whip correctly into a meringue, like leftover fat in your bowl before starting the meringue and even aquafaba that is not thick or reduced enough. I would recommend you check out my meringue troubleshooting guide before attempting this SMBC recipe again.
Therese
The recipe came together as it should, but unfortunately the taste of the Aquafaba is so strong. It’s all I can smell and taste when trying this buttercream. I might try to mix in cocoa powder or something so I can still use it for something and not waste all the ingredients!
Raspbelyse
I'm sorry you found the taste of aquafaba to be too storng. I recommend trying adding some extra vanilla or even getting yourself some Versahwip 600K o use as an aquafaba replacer.
Hannah
Hi! I’ve tried this recipe three times, feeling like I’m doing the same thing each time. The second time I had great results, but the first and third time, my mixture became completely liquid after adding the vegan butter, and will not whip up again, despite mixing for over 10 minutes. What am I doing wrong?
Raspbelyse
There are multiple things that could have happened. Here are some ideas but I can’t say for certain what happened without standing in your kitchen, underwhipped or too warm meringue, wrong kind of vegan butter or even the butter bring added too quickly.
Arlette
Hi Raspbelyse, thanks for your recipe. I am making a cake that is vegan AND sugar free, so I am subbing Swerve instead. I did sub the Versawhip for the aquafaba...thought it might be easier and whiter. I heated the versa with the water and Swerve to boiling, but the Swerve doesn't really dissolve. I'm used to sugar dissolving, but I didn't know how it was supposed to react, so once it was cool, I whipped it. The whip worked fine, and the butter cream was pretty smooth after the ten minutes of continued whipping. The problem is it is not stiff, more like pudding. Will putting it into the fridge firm it up, so I can paddle and pipe? I was hoping to pipe with a Russian piping tip for flowers on top, but at this rate, that isn't going to happen. Any advice? Thank you so much. I think I will stick to just vegan...lol.
Raspbelyse
I haven’t baked much with Swerve but I will blame the soft meringue on the different propreties between sugar and Swerve, as versawhip is very reliable. Refrigerating would not help make a meringue stiffer but if the butter has been incorporatedthen yes it would firm up a bit. You might need to add additional butter in this buttercream as russian tips require a firm buttercream.
LD
Hello! I want to try this recipe soon but I was wondering if I can let frosted cupcakes at room temperature and if so, for how long?
Thank you
Raspbelyse
Yes you can frost cupcakes with these but it is recommended to leave cupcakes in the refrigerator. They should be fine at room temperature for 2 to 3 hours but if its so hot outside that you are affadi of butter melting if you leave it out, don’t pull the cupcakes out of the fridge.
Katie
How would you turn this into a chocolate smbc?
Raspbelyse
I would recommend using ultra dark cacao powder
Brooke
Do you need to bloom it or add straight powder form? Would you add it at the end?
Raspbelyse
I usually just add it straight at the end. No need to bloom it.
Gunwant
Why isn’t my aquafaba getting fluffy?
Raspbelyse
I have a full post on troubleshooting vegan meringue that wont whip but the main culprit is probably leftover fat that got in contact with the aquafaba before it got whipped properly
Julie
Excited to try this! I'm going to be adding 3/4 cup of blackberry jam to flavor the icing after it's been fully whipped. Will it be stable enough if I only use 1 cup of sugar? I don't want it to get too sweet! Also, have you tried Miyokos cultured butter yet? It behaves just like butter and you can even brown it!
Raspbelyse
I dont recomend reducing the amount of sugar as it does create stability and the icing is already less sweet than an American-style buttercream. I have not tried Miyokos’s butter yet but its only because I cant get it where I live. However, I’ve only heard good things about it!
Julie
Thank you! I was concerned about that but I will stick with the recipe! Thank you for responding so quickly! I can't use the Earth Balance buttery sticks because they have soy in them and we don't have Becel in the U.S., so I'm hoping for the best with the Miyokos!
Julie
The Miyokos butter worked great!
Raspbelyse
Awesome! Happy to hear it
Angela
Hello! I am about to try this out for the first time. About how many cupcakes would you say this decorates?
Raspbelyse
Depending on how much icing you use for each cupcakes, I would say between 12 and 18 but it is an estimation
Raspbelyse
I’m not sure. I would say between 12 and 18 cupcakes depending on how much icing you like to use on your cupcakes
Larissa
Thanks so much for this recipe! I'm a little nervous to try it haha. Only have a can of chickpeas and a can of cannelini beans, so might try this using a mix of both bean liquids and omit the xanthan gum since I don't have any.
Do you reckon this could be made with your aquaflaxa recipe instead of aquafaba?
And I made your thermometer free caramel sauce today (used 20g of starch instead of 10g) - would I be able to add this to the SMB to make a salted caramel buttercream? I made an ermine buttercream today and added just a small bit of your salted caramel sauce into it and it split even though it was so little you couldn't even taste it.
Raspbelyse
So yes you can use a mix of aquafaba from different types of beans. If you are able to reach stiff peaks with aquaflaxa, then yes you can also make Swiss meringue buttercream with it. However, I do have to say that even I sometimes have trouble getting those stiff peaks with aquaflaxa, and is one of the reasons I don't use it anymore to make meringues. For the caramel free sauce, it is made from a soy milk base and unfortunately, the fat in buttercream doesn't like liquids much. It is also one reason why people have trouble with buttercream splitting when they try to color it. In this case, I would recommend using either a more classic caramel sauce, brown sugar, or vegan dulce de leche to flavor this buttercream.
Larissa
Thank you so much for the detailed explaination on the caramel sauce! The buttercream turned out incredible by the way! Made it twice thus far. Thanks for such a great recipe. You mention fridge storage, but I assume this SMB isn't suitable to be frozen?
Raspbelyse
Actually yes you can freeze Swiss meringue buttercream! Simply defrost it in the refrigerator overnight or longer and rewhip the same way than if you had refrigerated the icing.
Larissa
In regards to the brown sugar, does this mean I could make this buttercream recipe with brown sugar instead of white when simmering it with the aquafaba?
Raspbelyse
I havent tried it but my opinion is that it should be feasable