Marshmallow Buttercream Frosting

This Homemade Marshmallow Buttercream Frosting only requires 4 ingredients and it’s absolutely perfect. It’s one of my favorite frostings of all time!

Homemade Marshmallow Buttercream Frosting on spatula

I love homemade frosting.  I could honestly sit down with a big bowl of it and devour the whole thing. It might not be the best thing for me… but it sure would taste good 😉

I really don’t think I’ve met a homemade frosting that I didn’t like but I’ve met many NOT homemade frostings that I just couldn’t do. I can do a boxed cake mix, no problem. But the frosting? It’s gotta be made from scratch.  There is just nothing like a good homemade frosting.

This Marshmallow Buttercream is in my top 3 favorite frosting recipes. I can’t pick an absolute favorite because I love them all equally. (My other two favorites are cream cheese frosting & stovetop chocolate fudge frosting). But, this Marshmallow frosting is absolutely amazing. Fluffy, creamy, sweet perfection.

Homemade Marshmallow Buttercream Frosting

How do I make Homemade Marshmallow Buttercream Frosting? 

It’s super simple – you only need 4 ingredients!

Full measurements are in the printable recipe card at the bottom of this post.

There is also a video tutorial from me right above the recipe so you can see me making it in my own humble little kitchen. 🙂

  • butter
  • marshmallow fluff (also referred to as marshmallow cream)
  • confectioners sugar
  • vanilla extract 

Next step?

You just beat it all up with your electric mixer, starting with the butter – then marshmallow fluff, confectioners sugar, & finally the vanilla extract. You see all the little black specks in my picture? That’s because I use the vanilla extract that I make myself (and I also sell in it my store if you’re interested) and it’s made with really high quality vanilla beans with lots of little vanilla specks throughout. If you want the vanilla specks but don’t have my vanilla, you can add some of the inside of a vanilla bean if you’d like.

Once it’s all beaten together, you will have a beautiful creamy frosting perfect for any cake! You can also make an easy s’mores inspired cake by frosting a chocolate cake with this and topping it with graham cracker crumbs. I have yet to meet a cake that this wasn’t absolutely amazing on top of.

Marshmallow Buttercream Frosting


  • 1 cup room temperature butter
  • 1 7-ounce jar marshmallow creme
  • 2 cups confectioners sugar
  • 1 teaspoon vanilla
  • 1 vanilla bean optional


  • Cream the butter until it is light and fluffy. Add the marshmallow creme. Beat for 2 minutes.
  • Add the confectioners sugar and continue to beat for 2 minutes. Add the vanilla extract and the vanilla bean insides if you are using that. Stir to combine.
Homemade Marshmallow Buttercream Frosting