2 sticks melted butter
1 1/3 c. graham cracker crumbs
2 1/2 c. powdered sugar
1 c. chunky or plain peanut butter
1 lg. pkg. chocolate chips

Mix all but chocolate chips together and pat into 9x13 pan. Melt chocolate chips and spread over peanut butter mixture. Refrigerate and cut. Cut before it gets too hard, or chocolate will break.