2 cups sugar
1-3/4 cups all-purpose flour
3/4 cup HERSHEY'S Cocoa (I used the dark cocoa this time)
1-1/2 teaspoons baking powder
1-1/2 teaspoons baking soda
1 teaspoon salt
2 eggs
1 cup buttermilk (I used whole milk)
1/2 cup vegetable oil
2 teaspoons vanilla extract
1 cup boiling water (I used 2 Tbsp espresso + 1 cup boiling water instead)

1. Heat oven to 350°F. Grease and flour two 9-inch round baking pans.

2. Stir together sugar, flour, cocoa, baking powder, baking soda and salt in large bowl. Add eggs, milk, oil and vanilla; beat on medium speed of mixer 2 minutes. Stir in boiling water (batter will be thin). Pour batter into prepared pans.

3. Bake 30 to 35 minutes or until wooden pick inserted in center comes out clean. Cool 10 minutes; remove from pans, and flip over onto wire racks. Cool completely. 10 to 12 servings.


6 ounces semisweet baking chocolate, chopped (I used Callebaut; use good chocolate)
3 tablespoons unsalted butter, softened
2 tsp espresso powder (added to intensify chocolate flavor, optional)
3 eggs, separated
1/2 teaspoon cream of tartar
1/4 cup plus 2 tablespoons sugar
1/2 cup heavy cream, cold (do not use half-frozen cream; the whipped cream will curdle)
1/2 teaspoon vanilla extract

Place the chocolate and butter in a heatproof bowl, and place over a saucepan containing barely simmering water (or use a double boiler). Melt the chocolate and butter together and stir with a whisk until smooth. Add in the espresso powder. Remove from heat and cool slightly. Add the egg yolks to the chocolate, 1 by 1, beating with a whisk until incorporated. Set aside.

In another bowl, beat the egg whites until foamy. Add the cream of tartar, and continue to beat. Gradually whisk in 1/4 cup sugar, and continue beating until stiff peaks form.

Beat heavy cream in a chilled bowl with chilled beaters until it begins to foam and thicken up. Add the remaining 2 tablespoons sugar and vanilla. Continue to whip the cream until it holds soft peaks.

Gradually and gently fold the egg whites into the chocolate mixture to lighten it. Then, delicately fold in the whipped cream. Take care not over work the mousse, but make sure you blend in the cream well. Place the mousse on top of the first layer of cooled cake while still in the springform pan. Add the other cake layer. Add the other half of the mousse to the top layer. Flash freeze the cake for 1 hour and then cover with clear wrap to let freeze for 3 more hours or overnight.

Prepare the buttercream below, and refrigerate it if doing it ahead of time. If not, make it the day you'll be eating the cake.

4 oz bittersweet chocolate, finely chopped (I used Callebaut semi-sweet chocolate)
1 1/2 cups (3 sticks) unsalted butter
2 tablespoons cocoa powder, Dutch-processed
1 1/4 cups (125 g) powdered sugar
1 teaspoon vanilla extract

Fill a pot with water, bring to a boil, and place a larger bowl filled with the chocolate over it. It will melt gently.Let the chocolate cool to lukewarm on the side. Meanwhile, beat the butter until completely smooth. Add cocoa powder and beat in. Sift the powdered sugar directly over the bowl and beat that in. Next, in goes the vanilla and the melted chocolate. Mix together, and place a crumb coating on the cake. Refrigerate or freeze the cake for 30 mins-1 hour. Then, add another coat of frosting.

If you want to do a lot of decorating with his frosting, I suggest making another half portion of this frosting or doubling it.