Water Melon Cake 2 Reviews By Seeing_i_dog67 recipe Comments | 1 Favorites | 74 Print A watermelon cake made with real watermelon! Water Melon Cake Ingredients 1 (2-layer package) white cake mix1 small package mixed fruit gelatin powder1-1/3 cups seedless watermelon cut from the center and cubed into 1-inch blocks3 egg whites1 Tbsp vegetable oil1 cup miniature chocolate chips, optional Instructions Preheat oven to 350 F. Grease and flour a bundt cake pan (or 9 x 13-inch cake pan). In a medium bowl, whisk together cake mix and gelatin powder until combined. Set aside. In a large bowl, beat watermelon, egg whites, and vegetable oil until smooth. Add dry ingredients, half at a time, and mix until well-blended. Fold in chocolate chips, if using. Pour into prepared pan and bake about 35 minutes until toothpick inserted into the center comes out clean. Cool to room temperature before frosting.