Disappearing Marshmallow Brownies - cooking recipe

Ingredients

1/2 c. butterscotch pieces
1/4 c. butter or margarine
3/4 c. flour
1/3 c. firmly packed brown sugar
1 tsp. baking powder
1/4 tsp. salt
1/2 tsp. vanilla
1 egg
1 c. miniature marshmallows
1 c. chocolate chips
1/4 c. chopped nuts

Preparation

Double recipe for 9 x 13-inch pan.