HEAT oven to 350°F. Prepare cake batter as directed on package, using the egg white version; spoon into 24 paper-lined muffin cups, filling each cup half full. Bake as directed on package. Cool 15 min. (Do not remove from pan.) Pierce cupcakes with large fork at 1/2-inch intervals.
ADD boiling water to jelly powder; stir 2 min. until completely dissolved. Spoon over cupcakes. Refrigerate 3 hours.
FROST cupcakes with Cool Whip. Draw footballs on cupcakes with icing; top with sprinkles. Keep refrigerated.