This rich mixture of chocolate cake and two different kinds of ganache is a perfect party dessert. But beware, it's very rich, so serve in small portions. Servings: Makes one 9-inch three-layer cake, about 12 servings
¼ cup sugar ⅓ cup water ¼ cup orange liqueur
For the syrup, combine the sugar and water, bring to a boil and cool. Stir in the liqueur.
1 ¼ cups heavy whipping cream 16 ounces semisweet chocolate, cut into ¼-inch pieces 2 tablespoons (¼ stick) unsalted butter 2 tablespoons light corn syrup
To make the ganache filling, bring the cream to a boil, then remove from heat. Add the chocolate, allow to stand 2 minutes, whisk in the butter and corn syrup until smooth. Cool until thickened.
⅓ cup orange marmalade 1 tablespoon orange liqueur
To make the orange filling, stir the marmalade and the liqueur together.
1 cup heavy whipping cream 8 ounces semisweet chocolate, cut into ½ inch pieces
To make the glaze, bring the cream to a boil, then remove from the heat. Add the chocolate, allow to stand 2 minutes, then whisk until smooth. Strain into a bowl and cool to room temperature.
Assemble the cake
One 9-inch round Chocolate Genoise, baked and cooled
To assemble, slice cake into three horizontal layers and place one on a cardboard or springform base. Sprinkle layer with syrup and spread with half the orange filling. Spread with a third of the ganache filling. Repeat with remaining layers, syrup, marmalade, and ganache filling. Spread the outside of the cake with the remaining ganache but reserve enough to pipe some rosettes on the outside of the cake. Chill cake to set.
Place the chilled cake on a rack over a roasting pan and pour the glaze over it, starting in center of cake and pouring outward in larger and larger circles to the edge, ending at top edge. Let the glaze run down and cover the sides of the cake. Allow to stand about 5 minutes to set glaze. Use a pastry bag fitted with a small star tip to pipe rosettes around top edge of cake. To keep the glaze shiny, avoid refrigerating the cake.