1 1/2 c. peanut butter (plain or crunchy)
1 3/4 c. brown sugar
1 3/4 c. powdered sugar
1/4 c. butter, melted

TOP LAYER:

1 c. chocolate chips
1/4 c. butter (optional)

Mix together the first 4 ingredients (use mixer or bake hands) and place in 9 x 13 inch buttered dish. Next mix together 1/4 cup butter and 1 cup of chocolate chips. Microwave 2 minutes then stir. Spread over peanut butter layer. Refrigerate until set.