April Fools' Day Cheeseburger Cake

Name: April Fools' Day Cheeseburger Cake
Prep time: 2 h
Cook time: 30 min
Total time: 2 h 30 min
Cuisine: American
Ingredients: 1 (18 ounce) box white cake mix; 3 egg whites (or as called for by your cake mix); 1/3 cup oil (or as called for by your cake mix); 1 1/3 cups water (or as called for by your cake mix); 1 (18 ounce) box brownie mix; 1/4 cup water (or as called for by your brownie mix); 1/2 cup oil (or as called for by your brownie mix); 2 eggs (or as called for by your brownie mix); 5 sugar cookies (4 inches wide); 1 (16 ounce) can vanilla frosting; red food coloring; yellow food coloring; 10 spearmint candy leaves; 1/4 cup granulated sugar; 1 (16 ounce) can milk chocolate frosting