1/2 lb. butter
1 1/4 lb. chunky peanut butter
1 packet graham crackers, crushed
1 lb. confectioners sugar
16 oz. semi-sweet chocolate chips

Mix the butter, peanut butter, graham crackers, and powdered sugar in the order given. Press the mixture into the bottom of a 9 x 13 inch pan. Melt chocolate chips in a double boiler; spread evenly on the peanut butter mixture. Cool and score.