Double Chocolate Valentine

This cake is really the final word in chocolate cake, and it is based on my purest chocolate fantasy. It features a cocoa layer cake that uses the best cocoa, all egg yolks to give it its fullest flavor, and, to finish, a sweet injection of melted chocolate and cream. Astonishingly easy to make, it is at once fudgy moist and soft within, and becomes encased in a thin glaze of chocolate that forms by itself after brushing in the ganache. For Valentine’s Day, I like to bake the cake in a hear