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Delicious marshmallow buttercream frosting topped on a cake

Marshmallow Buttercream Frosting

A dreamy Marshmallow Buttercream Frosting that combines the sweetness of marshmallow fluff with creamy butter, perfect for cakes and cupcakes.
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Prep Time 10 minutes
Total Time 10 minutes
Servings: 12 servings
Course: Dessert, Frosting
Cuisine: American
Calories: 120
Ingredients Method Notes

Ingredients
  

Frosting Base
  • 1 cup unsalted butter Provides richness and smooth texture; substitute with vegan butter for dairy-free.
  • 4 cups powdered sugar Adds sweetness and structure; for a lighter frosting, reduce slightly but not too much.
  • 1 cup marshmallow fluff Brings authentic flavor and fluffiness; can substitute with vegan marshmallow fluff.
  • 2 teaspoons vanilla extract Enhances flavor; consider almond extract for a twist.
  • 2-4 tablespoons heavy cream Adjusts frosting consistency; half-and-half is a lighter option.

Method
 

Preparation
  1. In a large bowl, beat the softened butter until creamy.
  2. Gradually add in the powdered sugar, mixing well until you achieve a thicker texture.
  3. Mix in the marshmallow fluff and vanilla extract until fully incorporated.
  4. Add heavy cream a tablespoon at a time until you reach your desired consistency.
  5. Beat the mixture until fluffy and smooth, about 2-3 minutes.

Notes

To prevent clumping, avoid adding sugar too quickly. Overmixing can lead to a dense frosting. Ensure all ingredients are at room temperature for best results.