Preheat oven to 350°F. Spray First and Ten Football Pan with vegetable pan spray.
In large bowl, prepare brownie mix following package instructions; spread into prepared pan (will only fill pan about 1/3 full). Bake 30-35 minutes or until brownie tests done. Cool in pan on cooling grid 10 minutes; remove from pan and cool completely.
Place cooled brownie on serving platter. Add Tip 18 zigzag icing stripes and outline stitching.