Peanut Butter Cake
["1 yellow cake mix", "3 to 4 Tbsp. peanut butter", "pinch of salt", "1 tsp. margarine", "1/4 c. can milk", "1 tsp. vanilla", "1 1/2 c. sugar"]
["Mix and bake cake as directed in sheet cake pan.", "In medium saucepan, mix sugar, margarine, salt and milk.", "Bring to a boil on medium-high heat.", "Boil for 3 minutes, stirring constantly.", "Remove from heat.", "Stir in peanut butter.", "After peanut butter is melted, add vanilla.", "Mixture will harden quickly.", "Pour on cake and cool."]
["yellow cake", "peanut butter", "salt", "margarine", "milk", "vanilla", "sugar"]