4 sticks butter, at room temperature
2 cups confectioners sugar
1/2 teaspoon pure vanilla extract
One 16-ounce tub marshmallow cream
1.In a large mixing bowl, beat the butter until creamy.
2.Beat in one-fourth of the sugar until fluffy, then repeat with the remaining sugar.
3.Beat in the vanilla, then stir in the marshmallow cream until well blended