3 sticks butter
1 lb. peanut butter
1 lb. confectioners' sugar
2 c. crushed graham crackers
1 (12 oz.) bag chocolate chips

Melt 2 sticks butter, peanut butter and sugar together over low heat. Add crackers. (Mixture will get very thick.) Pat into large (13 x 9 inch) oblong pan. Melt remaining butter and chocolate chips together. Spread on top of mixture. Refrigerate at least 1 hour before cutting into squares.