All Chocolate Blackout Cake
Submitted by kimmoana
Intensely chocolate layer cake with cocoa filling and dark chocolate frosting, inspired by Brooklyn’s famous blackout cake. Four layers of moist cake with fudgy frosting.
YIELD
10 servingsPREP
30 minCOOK
1 hrsREADY
2 hrsThis legendary New York dessert delivers chocolate at every level, from the cocoa-milk cake layers to the bittersweet chocolate filling and glossy dark frosting.
Egg whites folded into the batter create remarkable tenderness while unsweetened chocolate and cocoa powder build deep, complex flavor.
Slicing each baked layer in half creates four dramatic layers, finished with crumbled cake coating the outside for rustic bakery appeal.
Chef Tips
- Make the filling first and refrigerate so it’s cold and spreadable when you’re ready to assemble
- The filling will seem runny at first but firms up beautifully when chilled
- Refrigerate the assembled cake for 10 minutes after the first frosting layer to help it set
- Serve within 24 hours for best texture and store in a cool place, not the refrigerator
Ingredients
Directions
Preheat oven to 375, prepare 2 8” pans (grease & flour)
Make the cake: Place cocoa in bowl and whisk in boiling water to form a paste.
Combine chocolate and milk in small saucepan over medium heat. Stir frequently until chocolate melts. Remove from heat, whisk a small amount of the hot chocolate milk into the cocoa paste to warm it. Whisk the cocoa mixture into the milk mixture. return the pan to medium heat and stir for 1 minute. Remove and set aside to cool until tepid.
In mixing bowl, cream butter and sugar together. beat in the egg yolks, one at a time, add the vanilla. Slowly stir in chocolate mixture.
Combine the flour, baking powder, baking soda and salt. Using a spatula add the flour mix to the chocolate mixture. Fold in until just mixed.
In another bowl whisk egg whites to form soft peaks. fold into batter, Divide the batter into the two pans. Bake until toothpick comes out clean of center about 45 minutes. Cool on rack for 15 minutes.
While cake is baking make the filling: combine the cocoa and boiling water in a small saucepan over low heat. Stir in sugar and chocolate. Add the dissolved cornstarch paste and salt to the pan and bring to a boil, stirring continuously. Boil for 1 minute. Remove from heat and whisk vanilla and butter. Transfer mix to a bowl, cover and refrigerate until cool.
Make the frosting: melt chocolate in double boiler over hot, NOT SIMMERING, water, stirring until smooth. Whisk in butter 1 tablespoon at a time. Remove from heat.
Whisk in hot water all at once and whisk until smooth. whisk in corn syrup and vanilla. Cover and refrigerate for up to 15 minutes prior to using.
Assemble the cake: Slice each layer to form 4 layers, set 1 layer aside. Place 1 layer on a cake plate. Generously swath the layer with ⅓ of the filling. Add the second layer and repeat. Set the third layer on top and quickly apply a layer of frosting to the topand the sides of the cake. Refrigerate for 10 minutes.
Crumble the remaining cake layer. apply the remaining frosting to the cake. Sprinkle liberally with the cake crumbs. Servethe cake within 24 hours. Store in a cool place. NOTE: Ingredients make a runny filling that’s OK. In fridge it hardens up.
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