Mousseline Buttercream Recipe

Adopted and perfected! This fabulous Mousseline Buttercream is incredibly stable and holds its shape beautifully, perfect for decorating cakes, cupcakes, and more. Learn how to make this unbelievably smooth and luxurious buttercream frosting that's sure to impress your friends and family!

Prep Time 15 mins
Cook Time 30 mins
Calories 1073.3 kcal
Protein 17g
Rating 4.2 (6 Reviews)
Mousseline Buttercream 15

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Recipe Author

Chef Forktionary, author of this recipe

Recipe adapted from Food.com. Standardized by Forktionary.

Ingredients for Mousseline Buttercream

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How to Make Mousseline Buttercream

  1. In a medium saucepan, gently heat the milk and sugar until the sugar dissolves completely. Do not boil.
  2. In a separate bowl, whisk together the egg yolks until pale and slightly thickened.
  3. Temper the egg yolks by slowly whisking in a few tablespoons of the warm milk mixture. This prevents the eggs from scrambling.
  4. Slowly whisk the tempered egg yolks into the remaining milk mixture. Cook over medium-low heat, stirring constantly with a spatula, until the mixture thickens enough to coat the back of the spoon (about 170°F).
  5. Strain the custard through a fine-mesh sieve into a bowl and let it cool completely. Cover the surface with plastic wrap to prevent a skin from forming.
  6. In a large bowl, beat the softened butter until light and fluffy.
  7. Gradually add the cooled custard to the butter, beating on low speed until combined. Then increase speed to medium-high and beat until light, fluffy, and completely smooth. This should take about 5-7 minutes.
  8. Add the vanilla extract and salt; beat until well incorporated.
  9. Your Mousseline Buttercream is ready! Use it to frost your favorite cakes and cupcakes.

Nutrition Information (Approximate per serving)

Sodium

3 g

Sugar

180g

Fat

310g

Carbs

18g

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