GREASE and flour 13x9-inch baking pan; set aside. Prepare cake batter and bake in prepared pan as directed on package. Cool 15 min. in pan; remove to wire rack. Cool completely.

TRIM corners and sides from cake to resemble football shape. Reserve trimmings for snacking or another use.

POUR milk into medium bowl. Add dry pudding mix and sugar. Beat with wire whisk 2 min. or until well blended. Gently stir in whipped topping; spread onto cake.

USE decorating gel to add the "laces" to the "football." Store in refrigerator.