Marshmallow Fluff Buttercream Frosting

★★★★★ 4 Reviews
gail0925 avatar
By Gail Springsteen
from Waupaca, WI

This frosting, although containing lots of butter, makes a good-sized batch of frosting. It works wonderfully for decorating, as it holds up well. You can add food coloring and simply increase the powdered sugar if it is too thin for you. And it tastes GREAT!

Blue Ribbon Recipe

Now, this is a scrumptious homemade buttercream recipe. It's so silky and fluffy, you could mistake it for an elegant Swiss meringue buttercream. The recipe is so simple and can be whipped up in a matter of minutes. Perfect for those moments you get a craving for cupcakes. It will elevate the flavor and texture of any cake you make from good to superb. The last step is the most important. Add as little or as much of the powdered sugar as you prefer for consistency and sweetness. In the Test Kitchen, we used 2 1/2 cups.

— The Test Kitchen @kitchencrew
method No-Cook or Other


  • 14 oz
    Marshmallow Fluff (not cream, Fluff)
  • 1 lb
    unsalted butter (if you use salted butter, eliminate the salt from the recipe)
  • 1 Tbsp
  • 1/4 tsp
  • 4 c
    powdered sugar (use to desired frosting stiffness)

How To Make

  • 1
    Use a spatula to scrape the Fluff and butter into your mixer bowl.
  • 2
    Scraping the spatula on the attachment helps to get it from the spatula to the bowl much more easily!
  • 3
    Mix well until fluffy. Gradually add the pinch of salt and vanilla. Mix well.
  • 4
    Add the powdered sugar slowly until you reach the desired consistency. You can also add food coloring to the frosting.