1 (18 oz.) jar peanut butter (smooth)
2 3/4 c. powdered sugar (confectioners')
1 stick butter
1 (12 oz.) pkg. chocolate chips
1 tbsp. butter

Melt stick of butter and mix with peanut butter and sugar. Spread in an 11x13 inch sheet cake pan.

Melt chocolate with 1 tablespoon butter. Spread on top of peanut butter. Refrigerate until chocolate hardens. Cut into squares.