2 c. brown sugar, packed
1 c. white sugar
1 c. evaporated milk
1/2 c. butter
1 (7 oz.) jar marshmallow creme
1 tsp. vanilla
1 (6 oz.) pkg. (1 c.) butterscotch pieces
1 (6 oz.) pkg. (1 c.) semi-sweet chocolate pieces

In saucepan, combine first 4 ingredients. Bring to a full boil, stirring constantly over moderate heat. Cook 10 minutes, stirring occasionally. Remove from heat. Add marshmallow creme and vanilla. Mix until smooth. Take 2 cups of this mixture and add to butterscotch pieces. Blend well. Pour evenly into greased 9-inch square pan.

Add remaining hot marshmallow creme mixture to chocolate pieces. Blend well. Pour over butterscotch mixture in pan. Chill until firm. Cut into squares. Serves 24-30.