Start with a cupcake iced with green-tinted frosting.
I painted Frankie’s hair with black spray frosting. This allowed me to add more of a dark tint to his face as well.
Since the monster is supposed to be made up of excess “parts,” I used two different color candies (Skittles or M&Ms are good) for eyes with a dot of purple frosting for the pupil. I built him up a nose with additional green frosting, gave him a terrible looking mouth and used mini pretzel rods as either bolts or his own special version of the arrow through the head prank.