1 1/2 c. fine graham cracker crumbs
1/2 c. peanut butter
1 (1 lb.) box powdered sugar
2 sticks butter, melted
1 (6 oz.) pkg. semi-sweet chocolate chips

Mix graham crackers, peanut butter and sugar in 13 x 9 inch pan. Melt butter and pour over mixture. Mix well and pat to make even. Melt chocolate chips and spread over mixture. Cool in refrigerator.