Chocolate-Peanut Butter Bars
["1 c. margarine", "2 1/2 c. graham cracker crumbs", "2 1/2 c. confectioner sugar", "1 c. peanut butter", "2 c. chocolate chips, melted"]
["Melt margarine; add graham cracker crumbs, sugar and peanut butter.", "Mix well.", "Spread evenly in buttered 9 x 13-inch pan. Melt chocolate chips; spread over top.", "Chill until firm.", "Cut into bars."]
["margarine", "graham cracker crumbs", "confectioner sugar", "peanut butter", "chocolate chips"]