Grand Marnier Wedding Cake

A dream I had was to offer one of my favorite cakes from my Cordon Rose Cooking School, the Gâteau au Grand Marnier et Chocolat, as a special wedding cake with three tiers (two layers each), frosted and filled with Grand Marnier Ganache. All of my testing with the larger layers was well worth it. And the cake has the extraordinary virtue of staying moist and delicious for up to three days at room temperature, even after you frost it.