1 c. peanut butter
1 lb. box 10X sugar
1/2 lb. melted butter
1/3 box graham cracker crumbs
12 oz. pkg. chocolate chips, melted

Mix first 4 ingredients. Pat into a 9 x 13 inch pan. Spread melted chocolate over graham cracker mixture. Refrigerate until firm. Remove from refrigerator and let sit at room temperature 1/2 hour before cutting.