1/4 c. brown sugar
1 lb. 10X sugar
1 stick unsalted butter, softened
2 c. smooth peanut butter

TOP LAYER:

12 oz. pkg. chocolate chips
1 tbsp. butter

Mix all ingredients for bottom layer. Pat into ungreased cookie pan 15 1/2 x 10 1/2 x 1 inch. Press in pan. Roll flat with rolling pin.

For top layer. Melt chocolate chips and butter. Spread over bottom layer. Cut into squares. Chill 25 minutes. Remove from pan. Put in airtight container.