Combine the boiling water with the matcha powder and 1 tablespoon granulated sugar in a small bowl; whisk and set aside. In a high-speed blender, blend the watermelon until pureed, then pour it into a bowl; set aside. In the same blender, blend the mango. (You may need to add a little water to help it blend.)
In a measuring cup, combine 1 cup cold water and 3 tablespoons gelatin. Whisk to bloom evenly. Bring 1 cup water to a boil in a saucepan over medium heat, then add 2 tablespoons powdered sugar and 1/4 teaspoon salt and whisk to combine and dissolve. Pour the boiling water mixture into the gelatin mixture and whisk until the gelatin has fully melted and is lump-free. Divide the gelatin mixture evenly amongst the pureed watermelon, pureed mango and matcha tea and whisk each to combine.
Pour each mixture into a 2-cup capacity plastic wrap-lined container or silicone mold. Refrigerate until fully set, at least 5 hours.
Invert each color onto a cutting board and cut into small cubes. Layer the jelly cubes in a bowl lightly coated with nonstick cooking spray. Refrigerate until ready to use.
In a medium bowl, whisk together the coconut milk and 1/4 cup heavy cream. Pour one third of the mixture into a separate bowl or measuring cup and sprinkle on the remaining 2 tablespoons gelatin powder; whisk to bloom evenly and set aside. Pour another third of the coconut mixture into a small saucepan and add the remaining 1/4 cup granulated sugar (if white is desired) or 1/4 cup brown sugar (if off-white is desired) and the remaining pinch of salt. Heat gently until the sugar is completely dissolved. Pour the hot mixture into the cold gelatin mixture and whisk until fully combined and melted. Whisk into the reserved coconut milk mixture and strain over the colorful gelatin cubes. Refrigerate overnight.
In a large bowl or stand mixer fitted with a whisk attachment, combine the remaining 1/2 cup heavy cream and remaining 2 tablespoons powdered sugar; whip to stiff peaks. Invert the jelly cake onto a serving dish and top with whipped cream and maraschino cherries.
The cake can be molded in anything that has about a 2-quart volume (bowl, standard loaf pan, 6-inch cake pan, silicone mold, etc.).
Tools You May Need
Tools You May Need
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