Not only do butterflies appear frequently on girl's birthday cakes; butterfly wedding cakes are popular with the butterflies either being the featured decoration or added to a spray of flowers. Gum paste butterflies are easy to make: roll the gum paste thin, use a cutter than cuts and stamps the impression in at the same time. Bend the butterflies in the middle so the wings stick up. You can lay them to dry on aluminum foil to help hold the shape. When they are dry, you can use edible paints to decorate them.