Peanut Butter Cake - cooking recipe

Ingredients

1 box Duncan Hines yellow cake mix
1/2 c. creamy or chunky peanut butter
1 box confectioners sugar
6 Tbsp. milk
1/2 stick margarine

Preparation

Make cake according to box directions.
Make stack or sheet cake.
Cool completely.
Mix all other ingredients in a medium saucepan; heat over medium heat until of smooth spreading consistency.
Spread on cool cake and enjoy.