1 pkg. crumbed graham crackers
1 box powdered sugar
1 c. butter
1 1/2 c. peanut butter
1 pkg. chocolate chips

Mix together thoroughly the graham crackers, powder sugar, butter and peanut butter. Press mixture into a 9 x 13 inch pan. Melt chocolate chips. Spread evenly over the mixture. Let chocolate cool, then cut into squares.