Heat oven to 350° (325° for dark or nonstick pans). Make, bake and cool cake as directed on box for 2 (8- or 9-inch) round cake pans, using water, oil and eggs. In medium bowl, tint 1 container frosting with neon purple food color. Using 1 cake round, cut in half to form 2 semicircles. Arrange halves on serving plate with cut side down and flat sides together with 1/4 cup frosting to form body. Frost cake with frosting. Cut teardrop-shaped ears from construction paper; insert into cake. Using toothpicks to attach, use 2 small marshmallow halves and 2 small jelly bean halves for eyes. Use large jelly bean for nose and sour candy strips for whiskers. Place gum halves just below nose for teeth. Use large marshmallow for tail. Repeat with remaining cake to make second bunny, using pink neon food color. Frost and decorate as above.
Children will love helping with this simple Bunny Cake recipe because they can customize it to make it their own. For example, surround your bunny cake with some grass made out of shredded coconut that has been colored with green food color, or really make the cake stand out by making it a polka-dotted or striped bunny. The Easy Bunny Cake recipe, which makes a pair of bunny cakes, is also a great centerpiece until it is time to indulge and enjoy.