Place canned vanilla frosting into a pastry bag fitted with a multiopening tip. Pipe frosting onto cupcakes. Sprinkle a work surface with sugar. Use a rolling pin to flatten large white gumdrops; cut or shape triangles to use for ears. Press ends of two gumdrop triangles into the frosting near top of each cupcake head; press into frosting to attach. Use purchased tube pink icing to pipe insides of ears. Use purchased tube black icing to pipe whiskers. Add a pink jelly bean nose. Pipe white icing for eyes (or use large white round candies); pipe a pupil onto each eye with black icing.