1 1/2 c. graham cracker crumbs
1 box powdered sugar
1 c. peanut butter (smooth or crunchy)
2 cubes (1 c.) butter, melted
1 (12 oz.) pkg. chocolate chips, melted

Mix graham cracker crumbs, sugar, peanut butter and butter. Press into 13 x 9 inch pan. Refrigerate a few minutes. Spread melted chocolate chips on top. Leave at room temperature until set. Cut into 1 inch squares. Can be refrigerated or frozen.