This marshmallow buttercream recipe is like adding a fluffy cloud of delicious flavor to your favorite cupcake or birthday cakes. It’s easy to make with a jar of marshmallow creme and can be tinted with food coloring to fit any theme.
In a large mixing bowl, beat butter and shortening with an electric mixer until light and fluffy, about 1 minute. Add vanilla extract and mix.
Gradually add sugar, one cup at a time, start by mixing on low speed then beating well on medium speed. Scrape the sides and bottom of the bowl often. When all sugar has been added, the frosting will appear dry.
Add marshmallow fluff; beat on medium speed until light and fluffy.