This no-bake raspberry mousse cake is a perfect dessert for those hot summer days when you don't want to turn on the oven. The recipe is simple and easy to follow. The cake is made with a graham cracker crust, layered with a creamy raspberry mousse, and topped with fresh raspberries. To make the raspberry mousse, you will need fresh raspberries, sugar, gelatin, and whipped cream. The cake can be made ahead of time and stored in the refrigerator until ready to serve. This cake is light, refreshing, and perfect for any occasion.