1 1/4 c. crushed graham crackers
1 1/3 sticks melted butter
2 c. powdered sugar
1 c. peanut butter
1 (6-12 oz.) pkg. chocolate chips (semi-sweet)

Combine graham crackers, butter, powdered sugar, peanut butter; mix until smooth. Pour into 13 x 9 x 2 inch pan. Melt chocolate chips and spread over peanut butter mixture. Cut while warm then chill until set.