- Butter and flour, for spring form pan
- 2 cups pastry flour
- 3/4 cup cocoa powder
- 11/2 teaspoons baking soda
- 1/2 teaspoon salt
- 1 cup unsalted butter, room temperature
- 2 cups sugar
- 4 eggs
- 1/2 cup plus 2 ounces buttermilk
- 1/2 cup plus 2 ounces brewed coffee
- 1 teaspoon vanilla extract
- Milk Chocolate Ganache, recipe follows
- Chocolate Ribbon, recipe follows
- Special equipment: 10-inch springform pan
Preheat the oven to 325 degrees F.
Butter and flour a 10-inch springform pan.
Mix in 1/3 of the dry ingredients, then half the wet ingredients. Repeat with the remaining dry and wet ingredients, finishing with dry. Pour the batter into the prepared cake pan. Bake for 1 hour, until a skewer inserted in the middle of the cake comes out clean. remove the cake from the pan after 15 minutes. Cool completely. Cut the cake into 2 layers.
Sandwich whipped ganache between the 2 layers and spread more ganache on the top and sides of the cake. Wrap the chocolate covered acetate around the cake, chocolate side in, overlapping the ends slightly. Refrigerate the cake until the chocolate in the ribbon has set. Carefully remove the acetate before serving.
Milk Chocolate Ganache:
1 cup heavy cream
1/2 pound milk chocolate, finely chopped
In a medium pot over high heat bring the cream to a boil. Remove from the heat and stir in the chocolate. Stir rapidly until all the chocolate has melted and the mixture is a smooth even color. Cool to room temperature stirring occasionally. Cover and refrigerate overnight. Whip the ganache in a chilled bowl until stiff peaks form, see Cook's Note*.
* Cook's Note: Do not over whip as the ganache may split.
5 ounces semisweet chocolate, melted
Special Equipment: 21/2-inch wide acetate ribbon, see Cook's Note*.
Cut a piece of 2 1/2-inch wide acetate ribbon long enough to wrap around the cake completely. Lay the acetate on a flat surface and spread the chocolate evenly over the entire surface using an offset spatula.
Carefully lift the acetate, chocolate side towards the cake, and wrap it around, lightly pressing it to the side of the cake. Work quickly; the chocolate should still be sticky when wrapped around on the cake. Refrigerate the cake until the chocolate in the ribbon has set.
* Cook's Note: Acetate ribbon is a medium gauge clear plastic often used for cake decorating and chocolate work. Sold in rolls, it can be found in baking supply stores.