Peanut Butter Frosting

2 sticks butter, at room temperature 
1 cup peanut butter
1 teaspoon vanilla
1/4 cup milk
4 cups powdered sugar
7 oz jar marshmallow creme

In the bowl of a stand mixer, beat the 2 sticks of butter, peanut butter, milk, and vanilla on medium low speed until well blended. 

Slowly add powdered sugar and beat on low until just barely blended. Increase speed until medium and beat for about 2 minutes, until light and fluffy. Fold in Marshmallow Creme, not fully combining to allow for a swirl of marshmallow throughout.

Frost cupcakes generously.