This marshmallow goes fantastic with peppermint chocolate donuts!

Marshmallow + buttercream = frosting bliss

Another super easy & super simple buttercream recipe! Marshmallow fluff gives this buttercream frosting an insanely yummy flavor, but also a beautiful texture. Like gooey marshmallows. Every baker always needs a simple go-to frosting recipe in their inventory of goodies and this marshmallow buttercream frosting is one of my favorites! Especially when paired with my Gingerbread Cupcakes or Hot Chocolate Cookies. Of course, as it obviously goes without saying, it goes so perfectly well for S’mores anything!

Be sure to grab the full recipe & check out the full video tutorial in the recipe card below. And if you try this recipe (I mean you totally should be), tag me on Instagram @imancake and use the hashtag #BakingWithMANCAKE.

Marshmallow buttercream frosting is such a perfect pairing with my gingerbread cupcakes!

Be sure to enter the MANCAKE KitchenAid giveaway.

I have 20 KitchenAid Stand Mixers to giveaway & one of them could be yours!

Marshmallow Buttercream Frosting

Marshmallow Buttercream Frosting

Cook Time: 5 minutes
Prep Time: 15 minutes
Total Time: 20 minutes


  • 1 stick butter at room temperature (see notes)
  • 1/2 cup vegetable shortening
  • 1 teaspoon vanilla
  • 4 cups powdered sugar, sifted (see notes)
  • 4 tablespoons heavy cream at room temperature (see notes)
  • 1 cup marshmallow fluff


  1. If not already done prior, sift 3 cups of powdered sugar. When finished, measure out 3 cups of sifted powdered sugar and put away what’s left.
  2. Beat butter, shortening, and marshmallow cream together until well combined, light, and fluffy.
  3. Beat in the vanilla extract.
  4. Place your stand mixer, or hand mixer, on the lowest possible setting. Begin to slowly and gradually add in your powdered sugar 1/2 cup at a time. (see notes)
  5. Add in heavy cream, 1 tablespoon at a time, while beating buttercream at a medium speed until light & fluffy. (see notes)
  6. If you'd like to cut the sweetness, you can incorporate a pinch of salt.


  • If you’d prefer to skip the shortening, simply swap it out with 1 additional stick of room temperature butter.
  • If you’d prefer a more white, stiffer, buttercream then simply omit the butter & replace with 1 additional cup of shortening. Also be sure to swap out the vanilla extract for clear vanilla extract.
  • Make sure you sift your powdered sugar. This will help the sugar mix into the butter & shortening smoothly.
  • When all your powdered sugar has been added in, the buttercream will appear dry. Don’t raise the alarms. When adding in your milk or heavy cream, your buttercream will start to have the fluffy texture it‘s known for.
  • Keep in mind that your heavy cream should be added in 1 tablespoon at a time. I do this way to make sure I am not drowning my buttercream to the point of a soupy mess.
  • Also worth mentioning, if desired, you can easily swap out the heavy cream for equal parts of your preferred milk.

Be sure to subscribe & ring the bell on the MANCAKE baking channel for weekly recipes & tutorials this way you can bake right along with me. Click – MANCAKE YouTube Channel

More Recipes You Might Enjoy:

Be sure to subscribe & ring the bell on the MANCAKE baking channel for weekly recipes & tutorials this way you can bake right along with me. Click – MANCAKE YouTube Channel

Stay Updated on All Things In and Out of the MANCAKE Kitchen:

What I Use To Make Videos: