1Heat oven to 350°F (325°F for dark or nonstick pan). Line 13x9-inch pan with foil so foil extends about 2 inches over sides of pan. Spray foil with cooking spray. Make brownies as directed on box for 13x9-inch pan. Cool completely, about 1 1/2 hours.
2Meanwhile, make goal posts* using craft sticks. Remove brownies from pan by lifting foil; remove foil. Place on serving tray.
3Mix frosting and food color to desired color. Spread over top and sides of cooled brownies. Draw field lines over frosting with white decorating icing. Place gummy bear candies on field. Microwave chewy chocolate candy on High 3 to 5 seconds, just until moldable. Shape into oval shape to make a football.
4Use decorating icing to draw lines on the chocolate candy to make laces for the football. Place on brownies. Insert goal post at each end of field. For easier cutting, use plastic knife dipped in hot water. For 24 brownie bites, cut into 6 rows by 4 rows.