Recipe can be doubled. Prepare batter as directed, doubling all ingredients and baking in foil-lined 13x9-inch pan 40 to 45 min. or until toothpick inserted in center comes out with fudgy crumbs. Makes 32 servings.
Cut brownie into assorted shapes with cookie cutters. Then, let the kids help decorate the cutouts with decorating gels and sprinkles.