Mommy'S Peanut Butter Frosting
["2/3 c. margarine", "1 c. powdered sugar", "1/2 c. creamy peanut butter", "1 box powdered sugar"]
["Cream butter, peanut butter and 1 cup powdered sugar until smooth.", "Add additional powdered sugar to reach desired consistency, usually about another cup and a half.", "Frosts a 2-layer cake.", "Best on devil's food cake!"]
["margarine", "powdered sugar", "peanut butter", "powdered sugar"]