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Marshmallow Buttercream Frosting
4.6 from 186 votes

Marshmallow Buttercream Frosting

This marshmallow buttercream frosting blends confectioners' sugar, butter, marshmallow fluff, vanilla extract, and salt to create a light, fluffy, and sweet topping. The combination whipped at varying speeds helps dissolve sugar into butter and incorporates air for volume. It is suitable for decorating cakes, cupcakes, and brownies with a smooth, creamy texture and subtle marshmallow sweetness.

Prep Time
5 mins
Total Time
5 mins
Servings: 4 cups
Calories: 1094 kcal
Course: Others

Ingredients

  • 7 cups confectioners' sugar
  • 4 sticks 2 cups unsalted butter, room temp
  • 3 cups marshmallow fluff or marshmallow creme
  • 3 teaspoons vanilla extract
  • ¼ teaspoon salt or to taste, fine

Instructions

    Cup of Yum
  1. To the bowl of a stand mixer fitted with either the paddle or whisk attachment (or a handheld electric mixer**) add all the ingredients, begin mixing on low speed until the confectioners' sugar starts to combine.
  2. After about 1 minute of mixing, turn speed up to medium for 30 seconds and mix before turning it up tohigh.
  3. Allow the buttercream to mix on high speed for another 4 minutes.***
  4. After it's done whipping up, use to frost cake, cupcakes, brownies, etc. by either piping it, dolloping it on, or spreading it. Frosting may be stored airtight in the fridge for up to 1 month.

Notes

  • For smooth frosting, sift confectioners' sugar if it is lumpy before mixing.
  • While a stand mixer is ideal, a handheld electric mixer can be used; whipping time might be longer.
  • Continue whipping for about 4 minutes to fully incorporate air and melt the sugar into the butter for better volume and consistency.
  • Refrigerate leftover frosting in an airtight container for up to 1 month; re-whip briefly before use if chilled.

Nutrition Information

Serving 4cups Calories 1094kcal (55%) Carbohydrates 252g (84%) Protein 1g (2%) Fat 12g (18%) Saturated Fat 7g (35%) Polyunsaturated Fat 4g (24%) Cholesterol 31mg (10%) Sodium 286mg (12%) Sugar 231g (462%)

Nutrition Facts

Serving: 4 cups

Amount Per Serving

Calories 1094

% Daily Value*

Serving 4cups
Calories 1094kcal 55%
Carbohydrates 252g 84%
Protein 1g 2%
Fat 12g 18%
Saturated Fat 7g 35%
Polyunsaturated Fat 4g 24%
Cholesterol 31mg 10%
Sodium 286mg 12%
Sugar 231g 462%

* Percent Daily Values are based on a 2,000 calorie diet.