Reese Peanut Butter Bars
["1 lb. margarine", "18 oz. peanut butter", "2 lb. confectioners sugar", "2 (1/2 lb.) Hershey bars"]
["Melt margarine with peanut butter; add confectioners sugar. Mix well and pour into a buttered 9 x 13-inch baking dish.", "Melt Hershey bars and spread on top.", "Cool in refrigerator until set. Cut into bars."]
["margarine", "peanut butter", "confectioners sugar"]