Homemade marshmallow frosting is easy to make with marshmallow fluff, butter, powdered sugar and vanilla. This fluffy icing is perfect for cookies, cakes and cupcakes!

Marshmallow fluff 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 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. Add all of the ingredients to the bottom of a large mixing bowl.
  • Mix. Using an electric mixer, whip mixture on medium speed until the consistency is smooth and fluffy.
  • Store. Cover the marshmallow frosting and place in the fridge until ready to use.

Helpful Tips

  • Consistency. 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.
  • Adding to baked goods. If frosting cupcakes, consistency should be thick enough to hold a point. If frosting cookies, I prefer it thinner so that it can easily spread on top.
  • How much frosting this will cover. This recipe makes enough to frost 12-15 cupcakes if using a piping tip. It will frost 24 cupcakes if you spread it on with a knife.
  • Spread then add toppings: If adding on any extra toppings such as sprinkles, make sure to do it immediately after you frost your dessert so that it sticks.

Ways to Use Marshmallow Frosting

There are so many ways to use marshmallow buttercream from cookies to cake or even just sandwiching it between two graham crackers!

Tearing apart oatmeal cookie with marshmallow frosting.

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

Recipes to Use with This Frosting

marshmallow frosting on cookie

Marshmallow Frosting

5 from 5 votes
Recipe by: Jamielyn Nye
Prep Time: 10 minutes
Total Time: 10 minutes
Servings: 24
Homemade marshmallow frosting is easy to make with marshmallow fluff, butter, powdered sugar and vanilla. This fluffy icing is perfect for cookies, cakes and cupcakes!
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Ingredients 

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

Instructions

  • Combine. Combine the 1/2 cup butter, 1 cup powdered sugar, 7 ounces marshmallow creme and 1 teaspoon vanilla in a large bowl.
  • Mix. Mix with beaters until smooth and creamy. Add 1/2 cup more powdered sugar if needed to thicken, or a Tablespoon of milk if needed to thin it out.
  • Store. Store in the refrigerator until ready to use.
  • Pipe or frost baked goods. Frost on cookies or add to a piping bag and frost cakes or cupcakes.

Last step: Please leave a comment and rating after you make the recipe.

Nutrition

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.

FAQs

Can I use regular marshmallows to make this frosting?

No, you need marshmallow fluff. Regular melted marshmallows do not contain the additional corn syrup and egg whites like fluff does and would not mix in well with the frosting.

Do I need to refrigerate this frosting?

You can keep it out at room temperature on the counter for about a day, then it will need to be refrigerated. I like to refrigerate it if I am going to pipe it. Bring to room temperature before using.

How to store leftover frosting?

You can store this marshmallow buttercream frosting covered in an airtight container in the refrigerator for up to 7 days. I wouldn’t freeze the frosting as the texture from the marshmallow fluff will change when thawing.