2 sticks butter
1 1/2 c. peanut butter
1/2 c. graham crackers, crushed
1 1/2 c. powdered sugar
1 (6 oz.) pkg. chocolate chips

Melt 1 1/2 sticks butter; add peanut butter. Combine the crushed graham crackers and powdered sugar; mix with peanut butter and butter. Pat in 8 x 10 inch pan. Melt chocolate chips and 1/2 stick butter. Spread over bars and refrigerate at least 4 hours before cutting.