Make cupcakes. Prepare batter following recipe directions. Tint 1/3 batter green and 2/3 batter orange.
Place two-tone insert in baking cup-lined muffin pan. Use a cut disposable decorating bag to fill center ring of insert 2/3 full with green batter. Use a cut disposable decorating bag to fill outer ring of insert 2/3 full with orange batter. Remove insert and repeat until all cavities are filled. Remove insert. Bake and cool cupcakes.