1 1/2 c. graham cracker crumbs
1 lb. box powdered sugar
1 1/2 c. peanut butter
2 sticks butter
1 (6 oz.) pkg. chocolate chips

Combine graham cracker crumbs, sugar and peanut butter and melted butter. Pat into 13 x 9 x 2 inch pan. Melt chocolate chips and spread on top of crumb mixture. Refrigerate and cool. Cut into squares.