Swiss Meringue Buttercream

Luscious and refined – This Swiss Meringue Buttercream is my favorite frosting because it’s smooth, silky, and not tooth-achingly sweet! It can be used on a variety of cakes and cupcakes as it can easily be flavored. For this recipe, I am using vanilla, but chocolate, espresso powder, fruit purees, caramel, and lemon zest are excellent alternatives too!

This Swiss Meringue Buttercream is so silky smooth and fluffy. Love swiss meringue because it's not overly sweet!

Swiss Meringue Buttercream is made by whipping a mixture of egg whites and sugar that has been gently heated in a double boiler until the sugar dissolves and the eggs are cooked. Cubes of room temperature butter are then gradually added to the meringue, then the flavor ingredients.

For this recipe, I am using vanilla, but chocolate, espresso powder, fruit purees, caramel, and lemon zest are excellent alternatives too!Just like crepes it may seem initimateding to make, but it’s actually doable once you’ve tried it! I highly suggest using a candy thermometer so you don’t have to guess if the egg whites are cooked and all the sugar has dissolved. You would know it’s ready when your thermometer hits 160 F / 70 C.

This Swiss Meringue Buttercream is so silky smooth and fluffy. Love swiss meringue because it's not overly sweet!

TIPS AND TROUBLESHOOTING SWISS MERINGUE BUTTERCREAM

  • The egg whites should be free of any bits of yolk. I always crack the egg and extract the egg whites in a separate bowl, then once I have a clean (not a bit of yolk) egg whites I pour it into another bowl together with the other egg whites. This is to ensure that if ever there is an egg yolk in it (and this has happened a lot to me!), I would not contaminate the other egg whites and don’t have to start all over again.
  • The metal and mixing bowls should be completely dry and clean before use. Ensure that there are no traces of grease.
  • The water in the double boiler should be in a simmer. The boiling water should not start the bottom of your metal bowl.
  • After adding all the butter the frosting might look curdled. This is okay! Just continue mixing for another 5 mins at medium-low speed (I used speed 4 for my Kitchen Aid mixer) and watch it turn from curdled to silky smooth.

How to store Swiss Meringue buttercream

Swiss Meringue Buttercream can be stored in an air-tight container in the fridge for up to 7 days or in the freezer for up to 2 months. Thaw frozen buttercream in the fridge. Bring the buttercream to room temperature then remix it again until it is smooth and silky. Let the mixer run on low speed for a few minutes to remove any air bubbles.

 

Swiss Meringue Buttercream

Swiss Meringue Buttercream is smooth, silky, and not tooth-achingly sweet. It can be used on a variety of cakes and cupcakes as it can easily be flavored. For this recipe, I am using vanilla, but chocolate, espresso powder, fruit purees, caramel, and lemon zest are excellent alternatives too!
Servings: 4 1/2 cups

Ingredients

  • 150 milliliters egg whites (approximately from 5 large eggs)
  • 250 grams granulated white sugar
  • 450 grams unsalted butter at room temperature ((cut into small cubes))
  • 2 1/2 teaspoons pure vanilla extract

Instructions

  • In a metal bowl, put the egg whites and sugar. Whisk by hand. Put the bowl over a saucepan (to create a double boiler) with simmering water. Whisk until it registers 160 F or 70 C on a candy thermometer.
  • Transfer the mixture in a stand mixer bowl and beat with whisk attachment on high speed for about 8-10 minutes or until medium-stiff peaks.
  • Switch to paddle attachment and on low speed, add the vanilla extract then the cubes of butter a few at a time.  Once incorporated, turn up the speed to medium-high until smooth and silky, about 3-5 minutes. Please see recipe notes about curdling.

Notes

This recipe is enough to fill and frost a three-layered 8-inch cake.
After adding all the butter the frosting might look curdled. This is okay! Just continue mixing for another 5 mins at medium-low speed (I used speed 4 for my Kitchen Aid mixer) and watch it turn from curdled to silky smooth.

12 thoughts on “Swiss Meringue Buttercream”

  1. Rebecca

    I’m looking for a frosting that can be stable on a wedding cake outside. Will this fair well out doors for a summer wedding?

    1. trish

      This may not hold up well in a hot and humid weather because it has a good amount of butter and might melt.

  2. Arlette

    Hi Trish
    I did my first attempt at doing the buttercream and it turned out great!! I’m so relieved now.
    Could I add coloured gel to the buttercream?

    1. trish

      Glad to know that, Arlette! =) I remember the first time I made this was a fail because I didn’t ensure that my whisk beater was grease-free.

      And yes, you can definitely add gel color to it.

  3. Arlette

    When do I need to take the butter out of the refrigerator to be at room temperature? 1 hour…..

    1. trish

      I take it out about 1 to 2 hours before I bake, but it really depends on what your weather is. It takes longer for me during winter time. To test, press your butter and it should give or dent slightly but it should still hold its shape. If you have a thermometer, room temperature butter is at around 65-70 Fahrenheit.

  4. Andie

    Hi. How do you store this buttercream before you finish a cake the next day? Do you leave it outside at room temperature or in the refrigerator? Thanks!

    1. trish

      I keep it in the fridge. Take it out about 30 minutes before using to soften it up a bit. You also need to whip it (about 5 minutes or so) until it becomes light and fluffy again.

  5. Diane

    Trish, does this buttercream dry up so that I may use it as a base for gild? My daughter wants a partially gilded wedding cake.
    Thanks

    1. trish

      Hello, Diane! Swiss Meringue buttercream doesn’t dry up.

    1. trish

      It’s at step 1…add the egg whites and sugar together. 🙂

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