Here is a great desert recipe from the mayor of St. Louis, Mo
combine graham cracker crumbs, 1 cup margarine, confectioners' sugar and peanut butter in a bowl. Mix well. Press into a 9x13-inch dish. Chill for 2 hours. Mix melted chocolate and 1/2 cup margarine in bowl. Spread over crumb mixture. Chill untill firm. Cut into bars.