Bottom Peanut Butter Layer:
12-oz. package peanut butter chips
1 cup peanut butter
1 can vanilla frosting
Top Chocolate Layer:
12-oz. package semi-sweet chocolate or milk chocolate chips
1 can chocolate frosting
Bottom Layer: Melt peanut butter chips in the microwave (stirring every 10 seconds until melted) or in a double boiler. Stir in peanut butter and vanilla frosting until smooth. Pour into a 13x9x2-inch buttered baking pan. Top Layer: Melt semi-sweet chocolate or milk chocolate chips, stir in chocolate frosting. Spread on top of Peanut Butter Layer. Refrigerate for one hour. Remove and cut into 2-inch squares.