photo: mydiversekitchen.com

¾ cup margarine
1 cup butterscotch chips
1-1/2 cups flour
2/3 cup brown sugar
2 teaspoons baking powder
2 eggs
2 teaspoons vanilla
2 cups miniature marshmallows
2 cups semisweet chocolate chips

Preheat oven to 350 degrees. Grease a 15 x 10-inch baking pan. Melt together margarine and butterscotch chips and stir until smooth. Cool. In a mixing bowl or stand mixer, stir together the flour, brown sugar and baking powder. Beat in eggs, vanilla and melted margarine and butterscotch chips. Mix well. Fold in marshmallows and chocolate chips. Spread in prepared pan. Bake for about 20 minutes. Cool on wire rack and cut into bars.