BLACKOUT RECIPE RECIPES

Steps:

• Preheat the oven to 375 degrees. 
• Butter and flour 2 (9-inch) cake pans. Cut 2 circles of parchment paper or waxed paper to fit the bottoms of the pans, then press them in. In a mixer fitted with a whisk attachment (or using a hand mixer), cream the butter and shortening together. Add the sugar and mix until light and fluffy. One by one, add the eggs, mixing after each addition. With the mixer running at low speed, add the vanilla, cocoa, baking powder, baking soda, and salt and mix. With the mixer still running at low speed, add about 1/3 of the cake flour, then about 1/3 of the milk, and mix. Repeat with the remaining cake flour and milk and mix. Pour into the prepared pans and bake until dry and springy to the touch and a tester inserted into the center comes out clean (a few crumbs are okay), 30 to 35 minutes. Let cool in the pan for 15 minutes, then turn out onto wire racks and let cool completely, to room temperature. Using a long serrated knife, cut the cake layers in half horizontally. Reserving 3 halves for the cake, put the remaining half in a food processor, breaking it up with your hands. Pulse into fine crumbs. 
• To finish the cake, place a cake layer on a cake plate or serving platter (reserving the most even layer for the top) and spread with cooled custard. Top with another layer of cake, then custard, then the final layer of cake. Cover the top and sides of the cake with the remaining custard. Coat the cake with the cake crumbs. Chill until ready to serve, at least 2 hours. Serve the same day.
• Pour 2 1/2 cups of the water, the sugar, corn syrup and cocoa powder into a large non-reactive saucepan and bring to a boil over medium-high heat, whisking occasionally. Meanwhile, in a small bowl, whisk the remaining 1/2 cup of water and the cornstarch. Whisk into the cocoa mixture in the saucepan and return the mixture to a boil, whisking constantly. Cook, whisking constantly, until very thick, 3 to 4 minutes. Remove from the heat and stir in the butter and vanilla. Pour into a bowl. Cover with plastic wrap, lightly pressing the plastic against the surface to prevent a skin from forming. Chill until firm, about 45 minutes.

Steps:

• Heat the oven to 375 degrees.
• To make the cake, place the cocoa in a small bowl and whisk in the boiling water to form a paste. Combine the chocolate and milk in a saucepan over medium heat. Stir frequently as the mixture warms and the chocolate melts, about 3 minutes. Remove from heat. Whisk a small amount of the heated chocolate milk into the cocoa paste and then whisk the cocoa mixture into the milk mixture. Return to heat, stir for one minute, remove and cool until tepid.
• In the bowl of a mixer, cream the sugar and butter together. Beat in the egg yolks one at a time and add the vanilla. Slowly stir in the chocolate mixture.
• Combine the flour, baking powder, salt and baking soda. Using a spatula or a wooden spoon, slowly add the flour mixture to the chocolate mixture. In another bowl, whip the egg whites to form soft peaks and, using a rubber spatula, gently fold the egg whites into the batter.
• Butter and lightly flour two 8-inch round cake pans and divide the batter between the two pans. Bake for 45 minutes and cool on a rack for 15 minutes. Gently remove the cakes from the pans and continue to cool.
• While the cake is baking, make the filling. Put the cocoa into a saucepan and pour in the boiling water and place over low heat. Add the sugar and chocolate. Dissolve the cornstarch in the cold water to make a smooth paste. Whisk the cornstarch into the water and chocolate, add the salt and bring it to a boil, stirring constantly. Boil for one minute.
• Remove the pan from the heat, whisk in the vanilla and the butter, and transfer the mixture to a bowl and refrigerate until cool.
• Make the frosting. In a double boiler, melt the chocolate. Remove from heat and whisk in the butter, one tablespoon at a time, returning to heat if necessary to melt the butter.
• Whisk in the hot water all at once and stir until smooth. Whisk in the corn syrup and the vanilla. Refrigerate for 20 to 30 minutes before using.
• Assemble the cake. Use a sharp knife to slice each cake into two disks to form four layers. Set one layer aside. Place one layer on a cake round or plate. Generously swath the layer with filling. Add the second layer and repeat. Add the third layer. Quickly apply a layer of frosting to the top and the sides of the cake and refrigerate for 10 minutes. Meanwhile, crumble the remaining cake layer. Apply a second layer of frosting to the cake, press cake crumbs into the top and sides of the cake, and serve within 24 hours. Store in a cool place.