BOTTOM:

2 sticks butter
2 1/2 c. crushed graham crackers
1 3/4 c. confectioners' sugar
1 c. peanut butter

TOP:

12 oz. pkg. chocolate chips
1 tbsp. butter

Melt butter and mix all ingredients together. Spread in 13 x 9 inch buttered pan. Melt chocolate bits with butter in double boiler. Smooth over top. Refrigerate and cut into squares.