1. Select a large, ripe watermelon that is firm and juicy, and wash it thoroughly.
2. Slice off the top and bottom of the watermelon to create flat surfaces for stability.
3. Stand the watermelon upright and cut away the rind in vertical strips, leaving a cylinder of watermelon.
4. Shape the watermelon into a smooth, even form by trimming the sides. You can shape it into a circle, square, or any design of your choice.
5. Prepare the frosting by whipping cream into soft peaks or using Greek yogurt as a healthier option. Add vanilla or watermelon extract for extra flavor, if desired.
6. Pat the watermelon dry with a paper towel to remove excess moisture and help the frosting adhere better.
7. Using a spatula, apply the whipped cream or yogurt evenly over the surface of the watermelon, covering it completely.
8. Smooth the frosting to create a polished look, or use a piping bag to add decorative patterns for extra flair.
9. Decorate the cake with fresh fruits like berries, kiwi slices, and citrus, arranging them in a pattern or scattered style for visual appeal.
10. Add a fresh pop of color by garnishing the decorated cake with mint leaves. For added crunch, sprinkle nuts or seeds like almonds, pistachios, or sunflower seeds.
11. Place the decorated cake in the refrigerator for at least 30 minutes to allow the flavors to meld and the frosting to set.
12. Before serving, slice the cake carefully with a sharp knife, cleaning it between cuts to maintain neat slices.
13. Present the chilled watermelon cake as the centerpiece of your meal, and serve it with other summer treats like sorbet, fruit salad, or chilled drinks.
14. Enjoy the refreshing and delightful watermelon cake as a guilt-free, healthy dessert option for any summer occasion.