Peanut Butter Frosting
["3 c. sugar", "1 1/2 sticks margarine", "3/4 c. milk", "1 c. peanut butter", "1 tsp. vanilla"]
["Combine all ingredients except vanilla in heavy saucepan. Stir over medium heat until sugar dissolves.", "Boil for approximately 2 minutes.", "Remove from heat and add vanilla.", "Cool and beat until right consistency for spreading.", "Frost tops and sides of three 9-inch layers."]
["sugar", "margarine", "milk", "peanut butter", "vanilla"]