1 1/2 c. peanut butter
1 c. + 2 tbsp. brown sugar
1 3/4 c. powdered sugar
4 tbsp. melted butter
1 c. chocolate chips

Mix together peanut butter, brown sugar, powdered sugar, 2 tablespoons melted butter. Spread in 9"x13" pan. Melt 2 tablespoons butter and chocolate chips. Spread over all. Refrigerate.