PREHEAT oven, grease 13 x 9-inch baking pan and prepare brownie mix batter according to package directions.
SPREAD batter into prepared baking pan. Sprinkle with 1 cup morsels.
BAKE according to package bake times for 13 x 9-inch pan size. Cool completely in pan on wire rack.
TINT frosting with food coloring to desired shade. Spread frosting over brownie. Sprinkle with remaining morsels. Cut into bars. Store covered in cool place.
VARIATION: Along with sprinkling the morsels over the frosting, top with additional Halloween sprinkles. Chocolate frosting can be used in place of orange-tinted frosting.