This dark chocolate raspberry truffle cake is perfect for those who love the intense flavor of dark chocolate. The cake is made with a dark chocolate cake mix, raspberry jam, and a dark chocolate ganache. To make the cake, simply follow the instructions on the cake mix box and bake the cake in two 9-inch round pans. Once the cake has cooled, spread raspberry jam between the layers and cover the cake with a dark chocolate ganache made with heavy cream and dark chocolate. Garnish with fresh raspberries and enjoy!