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Marshmallow Frosting

Fluffy homemade marshmallow frosting is easy to make with a few ingredients including marshmallow fluff, butter, powdered sugar and vanilla. This glossy icing is perfect for cookies, cakes and cupcakes!

Marshmallow fluffy frosting is a favorite for chocolate cupcakes from scratch and easy vanilla cupcakes! We even love it in this frozen s’mores recipe.

Marshmallow frosting on oatmeal cookie.
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Easy Marshmallow Frosting

I first tried this frosting recipe when I made homemade oatmeal cream pies. After the first bite, I was hooked! It has the perfect consistency with amazing marshmallow fluff flavor. I could seriously eat it with a spoon!

This marshmallow frosting takes your classic buttercream frosting up a notch. The added marshmallow cream makes consistency super fluffy and delicious. It’s perfectly sweet and rich and makes a great compliment to so many desserts.

4 Simple Ingredients

  • Butter: Softened salted butter works best. If using unsalted, add 1/4 teaspoon salt for every stick of butter.
  • Powdered sugar: This helps make it sweet and creamy. Add more or less powdered sugar depending on the type of consistency you want.
  • Marshmallow creme: Also known as marshmallow fluff. You’ll need 1 jar.
  • Vanilla extract: For an extra boost of flavor.

How to Make Marshmallow Frosting

Mixing marshmallow frosting with electric beaters.
  • Combine. To get started, add all of the ingredients to the bottom of a large mixing bowl.
  • Mix. Using an electric mixer, mix until the consistency is smooth and creamy.
  • Store. Cover the frosting and place in the fridge until ready to use.

Helpful Tips

  • To thin it out a little, mix in 1-2 Tablespoons of milk or heavy cream. Add more powdered sugar to thicken the frosting if needed.
  • If frosting cupcakes, you want the consistency to be thick enough to hold a point. If frosting cookies, I prefer it a bit thinner so that it can easily spread on top.
  • This recipe makes enough frosting for 12-15 cupcakes if using a piping tip. It will frost about 24 cupcakes if you spread it on with a knife.
  • If adding on any extra toppings, make sure to do it immediately after you frost your dessert so that it sticks.
Tearing apart oatmeal cookie with marshmallow frosting.

More frosting recipes we love include this powdered sugar icing, vanilla frosting and cream cheese glaze!

More Recipes to Use it On

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marshmallow frosting on cookie

Marshmallow Frosting

5 from 5 votes
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Author: Jamielyn Nye
Fluffy homemade marshmallow frosting is easy to make with a few ingredients including marshmallow fluff, butter, powdered sugar and vanilla. Use it on cakes, cupcakes and cookies!
Prep Time: 10 minutes
Total Time: 10 minutes
Servings: 24


  • ½ cup salted butter (softened)
  • 1 to 1 ½ cups powdered sugar
  • 7 ounce jar marshmallow creme
  • 1 teaspoon vanilla extract


  • Combine the butter, powdered sugar, marshmallow creme and vanilla in a large bowl.
  • Mix with beaters until smooth and creamy. Add more powdered sugar if needed to thicken, or a Tablespoon of milk if needed to thin it out.
  • Store in the refrigerator until ready to use.
  • Frost on cookies or add to a piping bag and frost cakes or cupcakes.


Calories: 89kcal | Carbohydrates: 15g | Protein: 1g | Fat: 4g | Saturated Fat: 2g | Cholesterol: 10mg | Sodium: 34mg | Sugar: 12g | Vitamin A: 118IU | Calcium: 1mg

Nutrition provided is an estimate. It will vary based on specific ingredients used.

Course: Dessert
Cuisine: American

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