1 c. butter
1 c. graham cracker crumbs
3 1/2 c. powdered sugar
1 c. peanut butter
1 (12 oz.) pkg. chocolate chips

Melt butter; add cracker crumbs, powdered sugar and peanut butter mix and press in the bottom of a 9"x13" pan. Melt chocolate chips and spread on top. Refrigerate. Cut and serve.