1 (6 oz.) pkg. butterscotch chips
1/4 c. packed brown sugar
1/4 c. butter
1 egg
3/4 c. flour
1 tsp. baking powder
1/4 tsp. salt
1 (6 oz.) pkg. chocolate chips
1 c. miniature marshmallows
1/2 c. chopped walnuts
1 tsp. vanilla

In large saucepan, melt butterscotch chips, brown sugar and butter over medium heat, stirring constantly. Remove from heat. Add egg; beat well. Blend in flour, baking powder and salt. Stir in remaining ingredients. Spread mixture in greased 8 inch square pan. Bake at 350 degrees for 20-25 minutes. Cool. Cut into bars.