If you’re a true chocolate lover, Chocolate Blackout Cake is the kind of dessert that feels legendary. This classic cake is intensely chocolatey, ultra-moist, and layered with a rich chocolate pudding-style filling, then finished with a silky frosting and a blanket of chocolate crumbs.
Unlike ordinary chocolate cakes, a blackout cake delivers multiple layers of chocolate texture—soft cake, creamy filling, smooth frosting, and fudgy crumbs—making every bite pure chocolate bliss. It’s perfect for birthdays, celebrations, or anytime you want a show-stopping dessert.
Ingredients
Makes 1 (two-layer 8-inch cake) — serves 10–12
For the Chocolate Cake
- 1 3/4 cups (220g) all-purpose flour
- 2 cups (400g) granulated sugar
- 3/4 cup (75g) unsweetened cocoa powder
- 2 teaspoons baking soda
- 1 teaspoon baking powder
- 1 teaspoon salt
- 2 large eggs
- 1 cup (240ml) buttermilk (or milk + 1 tbsp vinegar)
- 1/2 cup (120ml) vegetable oil
- 2 teaspoons vanilla extract
- 1 cup (240ml) hot coffee (or hot water)
For the Chocolate Pudding Filling
- 2 1/2 cups (600ml) milk
- 1/2 cup (100g) granulated sugar
- 1/4 cup (30g) cornstarch
- 1/4 cup (25g) unsweetened cocoa powder
- Pinch of salt
- 4 oz (113g) semi-sweet chocolate, chopped
- 2 tablespoons (28g) butter
- 1 teaspoon vanilla extract
For the Chocolate Frosting
- 1 cup (226g) unsalted butter, softened
- 3 cups (360g) powdered sugar, sifted
- 3/4 cup (75g) unsweetened cocoa powder
- 1/3 cup (80ml) heavy cream or milk (add as needed)
- 1 teaspoon vanilla extract
- Pinch of salt
Optional (for “Blackout” Crumbs)
- 1–2 cups cake scraps (from trimmed cake layers) or crushed chocolate cookies
Preparation Time
- Prep time: 30 minutes
- Cooking time: 30–35 minutes
- Cooling + chilling time: 1–2 hours
- Total time: About 2 hours 30 minutes
Step-by-Step Instructions
Step 1: Bake the Cake Layers
Preheat oven to 350°F (175°C). Grease and line two 8-inch cake pans.
In a large bowl, whisk flour, sugar, cocoa powder, baking soda, baking powder, and salt. Add eggs, buttermilk, oil, and vanilla. Mix until smooth. Slowly pour in hot coffee and mix (batter will be thin).
Divide into pans and bake 30–35 minutes, or until a toothpick comes out clean. Cool completely.
Step 2: Make the Chocolate Pudding Filling
In a saucepan, whisk milk, sugar, cornstarch, cocoa powder, and salt. Cook over medium heat, whisking constantly, until thickened (about 5–7 minutes).
Remove from heat and stir in chopped chocolate, butter, and vanilla until smooth. Cover with plastic wrap pressed directly on the surface. Chill until cool.
Step 3: Make the Chocolate Frosting
Beat butter until creamy. Add powdered sugar and cocoa powder gradually. Add cream (a little at a time) until spreadable. Mix in vanilla and salt.
Step 4: Create the Blackout Crumbs (Optional)
Trim the cake tops if needed. Crumble the scraps into fine crumbs. (Or crush chocolate cookies.)
Step 5: Assemble the Cake
Place one cake layer on a plate. Spread a thick layer of chocolate pudding filling. Add the second layer on top.
Frost the top and sides with chocolate frosting.
Step 6: Finish with Crumbs
Press the crumbs onto the sides and sprinkle over the top to create the classic blackout look.
Step 7: Chill and Slice
Chill the cake for 30 minutes before slicing for clean layers and the best texture.
Serving Suggestions
- Serve slightly chilled for clean slices and intense chocolate flavor.
- Pair with fresh berries to balance the richness.
- Add a scoop of vanilla ice cream for a classic combo.
- Serve with coffee or espresso for the ultimate chocolate moment.
- Top with chocolate curls or a light dusting of cocoa powder.
Nutritional Highlights
| Nutrient | Per Serving (1 slice, 1/12 cake) |
|---|---|
| Calories | 520 |
| Protein | 6 grams |
| Total Fat | 28 grams |
| Saturated Fat | 14 grams |
| Carbohydrates | 66 grams |
| Sugars | 48 grams |
| Fiber | 4 grams |
| Sodium | 380 milligrams |
Nutritional Notes:
- Cocoa and dark chocolate provide antioxidants and intense flavor.
- This is a rich celebration cake—smaller slices go a long way.
- You can reduce sweetness slightly by using darker chocolate in the filling.
Tips for a Perfect Blackout Cake
- Use hot coffee in the batter for deeper chocolate flavor (it won’t taste like coffee).
- Chill the pudding filling so it spreads thick and doesn’t run.
- Cool cake layers completely before frosting to avoid melting.
- For super neat slices, chill the cake and use a warm knife to cut.
- Don’t skip the crumbs—they give the signature blackout texture.
Variations to Try
- Three-Layer Version: Bake in three thinner layers for a taller cake.
- Chocolate Ganache Finish: Replace frosting with ganache for a glossy, bakery look.
- Mocha Blackout Cake: Add espresso powder to the filling.
- Gluten-Free: Use a 1:1 gluten-free flour blend.
- Dairy-Free: Use plant milk and dairy-free butter (texture may vary slightly).
This Chocolate Blackout Cake is the ultimate dessert for serious chocolate fans. With moist chocolate layers, creamy pudding filling, silky frosting, and signature crumbs, it’s bold, dramatic, and completely unforgettable.
Whether you’re baking for a special occasion or just treating yourself, this cake guarantees a deep, dark, chocolatey bite every time.
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