Peanut Butter Cups
["1 (16 oz.) box powdered sugar, sifted", "1 qt. peanut butter", "1 lb. margarine", "1 (12 oz.) pkg. milk chocolate chips"]
["Cream margarine and peanut butter.", "Add sugar.", "Knead with fingers.", "Put into a 9 x 13-inch pan.", "Melt chocolate chips in double boiler and pour over peanut butter mixture.", "Refrigerate until firm.", "Cut into squares."]
["powdered sugar", "peanut butter", "margarine", "milk chocolate chips"]