- Prep Time
- 4 sticks (1 pound) unsalted butter, at room temperature
- 2 cups confectioners sugar
- 1/2 teaspoon pure vanilla extract (optional)
- 1 16 ounce tub marshmallow cream (such as Marshmallow Fluff brand)
In a large mixing bowl, beat the butter until creamy.
Beat in one-fourth of the sugar until fluffy, then repeat with the remaining sugar.
Beat in the vanilla, then stir in the marshmallow cream until well blended.