Soft, silky, and irresistibly fluffy, this frosting is great on any cake or cupcake!
1 7oz tub marshmallow fluff (anywhere close to 7oz is fine, brands may vary)
1 cup powdered sugar
1 cup (2 sticks) real butter, at room temperature
1 teaspoon vanilla extract, optional
Beat butter until light and fluffy, add sugar and vanilla and continue beating. Add marshmallow fluff and beat at medium-high speed for 1-2 minutes until smooth and fluffy.