2 sticks melted butter
2 1/2 cups fine graham cracker crumbs
1 3/4 cups powdered sugar
1 cup peanut butter
12 oz. pkge. semi-sweet chocolate chips
Mix melted butter, graham cracker crumbs, powdered sugar and peanut butter until well blended. Spead in 9" x 13" pan.

Melt chocolate chips and spread over mix. Refrigerate until chocolate hardens. Cut into squares. (Letting the chocolate soften somewhat will make cutting easier.)