This dark chocolate cake recipe is inspired by classic bakery-style cakes, with a deep cocoa flavor and a perfectly moist crumb. It’s a favorite for birthdays, celebrations, or simply as a decadent treat for chocolate lovers. The ingredients and steps are straightforward, ensuring reliable results even for beginner bakers.
Ingredients
- 1 and 3/4 cups (220g) all-purpose flour
- 3/4 cup (65g) unsweetened natural cocoa powder
- 2 cups (400g) granulated sugar
- 1 and 1/2 teaspoons baking powder
- 1 and 1/2 teaspoons baking soda
- 1 teaspoon salt
- 2 large eggs, at room temperature
- 1 cup (240ml) buttermilk, at room temperature
- 1/2 cup (120ml) vegetable oil
- 2 teaspoons pure vanilla extract
- 1 cup (240ml) hot coffee (freshly brewed, or hot water as a substitute)
- For the frosting: 1 cup (230g) unsalted butter, softened
- 3 and 1/2 cups (440g) powdered sugar
- 1 cup (85g) unsweetened cocoa powder
- 1/2 teaspoon salt
- 2 teaspoons vanilla extract
- 1/4 cup (60ml) heavy cream (plus more as needed)
Instructions
- Prepare the pans and oven: Preheat your oven to 350°F (177°C). Grease two 9-inch round cake pans with nonstick spray or butter. Line the bottoms with parchment paper and lightly dust with cocoa powder for easy release.
- Mix dry ingredients: In a large bowl, sift together the flour, cocoa powder, sugar, baking powder, baking soda, and salt. Whisk well to ensure all dry ingredients are evenly combined.
- Combine wet ingredients: In a medium bowl, whisk together the eggs, buttermilk, oil, and vanilla extract until smooth.
- Combine wet and dry mixtures: Pour the wet ingredients into the bowl of dry ingredients. Mix gently with a spatula or mixer on low until just combined—some lumps are okay.
- Add hot coffee: Slowly pour the hot coffee into the batter and mix on low speed. The batter will be thin, but that’s expected for a moist cake.
- Bake: Divide the batter evenly between the prepared cake pans. Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean or with just a few moist crumbs.
- Cool: Let the cakes cool in the pans for 10 minutes, then run a knife around the edges and invert onto a wire rack. Remove the parchment and let cool completely before frosting.
- Make the frosting: In a large bowl, beat the softened butter on high speed until creamy (about 2 minutes). Add powdered sugar and cocoa powder, then mix on low speed until combined. Add salt, vanilla, and heavy cream. Beat on high for 2–3 minutes until fluffy. Add more cream if needed for a spreadable consistency.
- Assemble: Place one cake layer on a serving plate. Spread a generous layer of frosting on top. Add the second cake layer and cover the top and sides with the remaining frosting. Smooth with an offset spatula for a classic finish.
- Serve: Slice and enjoy! For best texture, let the cake sit at room temperature for 30 minutes before serving if refrigerated.
Tips
- Buttermilk substitute: If you don’t have buttermilk, make your own by adding 1 tablespoon of lemon juice or white vinegar to 1 cup of milk. Let it sit for 5 minutes before using.
- Room temperature eggs: Use eggs at room temperature for a smoother batter and more even rise. To quickly warm eggs, place them in a bowl of warm (not hot) water for 5–10 minutes.
- Coffee enhances chocolate: The hot coffee intensifies the chocolate flavor, but you won’t taste the coffee itself. If you prefer, use hot water instead.
- Don’t overmix: Overmixing the batter can make the cake dense. Mix only until the ingredients are combined, especially after adding the coffee.
Serving Suggestions
This dark chocolate cake is versatile and pairs well with a variety of accompaniments. For a special occasion, serve with a scoop of vanilla ice cream or a dollop of freshly whipped cream. Fresh berries, such as raspberries or strawberries, add a burst of color and tartness that balances the rich chocolate. For a more decadent touch, drizzle each slice with warm chocolate ganache or a sprinkle of flaky sea salt. The cake is delicious on its own but also makes an impressive centerpiece for birthdays, holidays, or dinner parties.
Variations
- Chocolate chips: Fold 1 cup of semi-sweet or dark chocolate chips into the batter before baking for extra pockets of chocolate.
- Layer cake: Make a three-layer cake by dividing the batter into three 8-inch pans and reducing bake time to 22–26 minutes.
- Vegan version: Use non-dairy milk with vinegar for buttermilk, and substitute eggs with flax eggs (2 tablespoons ground flaxseed + 6 tablespoons water, mixed and rested 5 minutes). Use vegan butter for the frosting.
- Sheet cake: Bake in a 9×13-inch pan for 35–40 minutes. This is ideal for potlucks and larger gatherings.
Storage and Reheating
Store the cake covered at room temperature for up to 2 days, or in the refrigerator for up to 5 days. To keep the cake moist, press plastic wrap directly against any cut surfaces. For longer storage, wrap slices or whole layers tightly in plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before serving. If you prefer the cake warm, microwave individual slices for 10–15 seconds, just until slightly heated. Avoid overheating, as this can dry out the cake.
Frequently Asked Questions
- Can I use Dutch-process cocoa instead of natural cocoa?
- Natural cocoa is recommended because it reacts properly with the baking soda and baking powder in this recipe, ensuring the cake rises well. If you only have Dutch-process cocoa, the cake may be denser and may not rise as much. For best results, stick to unsweetened natural cocoa powder.
- Why does the batter seem so thin?
- The batter is meant to be thin after adding the hot coffee or water—this is key to a moist, tender crumb. Don’t worry; it will bake up perfectly.
- Can I make cupcakes with this recipe?
- Yes! Divide the batter evenly among 24 lined cupcake tins and bake at 350°F (177°C) for 18–22 minutes, or until a toothpick comes out clean. Watch closely, as cupcake ovens may vary.
- How do I prevent my cake from sticking to the pan?
- Grease pans thoroughly, line the bottom with parchment paper, and dust with cocoa powder. Let the cakes cool for 10 minutes before inverting. These steps help ensure easy release every time.
- Can I make the cake layers in advance?
- Absolutely. Bake and cool the layers, then wrap tightly in plastic wrap and refrigerate for up to 2 days, or freeze for up to 3 months. Assemble and frost after thawing if frozen.
- Is the frosting very sweet?
- The buttercream is rich and chocolatey but not overly sweet, as the cocoa powder balances the sugar. If you prefer less sweetness, reduce the powdered sugar slightly and add more cocoa or a pinch more salt to taste.
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