Slice three even layers from the cake, between ¼ and ½ in/0.6 cm and 1 cm thick. Place one of the cake layers on an 8-in/20-cm cardboard cake round. Moisten with simple syrup and coat with 4 oz/110 g of the ganache. Top with another layer of cake, moisten with simple syrup, and coat with 4 oz/110 g of the ganache. Top with the final layer of cake and moisten with simple