This chocolate layer cake with vanilla buttercream has three cocoa-rich cake layers, a smooth vanilla frosting and a glossy chocolate ganache drip. The recipe uses three 8-inch round pans and serves 12–14. Allow the cakes to cool completely before filling and frosting, then add ganache while it is cool but still pourable.
Cooking Time & Yield
- Prep Time: 30 minutes
- Bake Time: 25–30 minutes
- Cooling & Decorating: 1 hour
- Total Time: ~2 hours
- Yield: 12–14 servings
Ingredients
For the Cake Layers
- 2 cups all-purpose flour
- 1 ¾ cups sugar
- ¾ cup cocoa powder
- 2 teaspoons baking powder
- 1 ½ teaspoons baking soda
- 1 teaspoon salt
- 3 large eggs
- 1 cup buttermilk (or 1 cup milk + 1 tbsp vinegar)
- ½ cup vegetable oil
- 2 teaspoons vanilla extract
- 1 cup hot coffee (or hot water for a milder taste)
For the Vanilla Buttercream
- 1 cup unsalted butter, softened
- 4 cups powdered sugar
- 3 tablespoons heavy cream
- 2 teaspoons vanilla extract
- Pinch of salt
For the Chocolate Ganache Drip
- 1 cup semi-sweet chocolate chips
- ½ cup heavy cream
For Topping
- Chocolate truffles or chocolate-covered nuts
- Fresh mint leaves
Instructions
Step 1: Bake the Cake Layers
- Preheat oven to 350°F (175°C). Grease and line three 8-inch (20 cm) round cake pans.
- In a large bowl, whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt.
- Add eggs, buttermilk, oil, and vanilla extract. Mix until smooth.
- Slowly stir in hot coffee (the batter will be thin, which is perfect for a moist cake).
- Divide the batter evenly among the pans and bake for 25–30 minutes until a toothpick inserted comes out clean.
- Let cakes cool completely before frosting.
Step 2: Make the Vanilla Buttercream
- Beat softened butter with a mixer until creamy and pale.
- Gradually add powdered sugar, mixing on low speed.
- Add heavy cream, vanilla extract, and a pinch of salt. Beat on high for 2–3 minutes until fluffy and smooth.
Step 3: Make the Ganache Drip
- Heat the heavy cream in a saucepan until just simmering.
- Pour over the chocolate chips and let sit for 2 minutes.
- Stir until smooth and glossy. Let it cool until still pourable but no longer hot before dripping over a chilled, frosted cake.
Step 4: Assemble the Cake
- Place the first cake layer on a serving plate and spread a generous layer of buttercream.
- Repeat with the second and third layers, then frost the outside of the cake smoothly with buttercream.
- Pour the ganache around the top edge of the cake, letting it drip naturally down the sides.
- Pipe decorative buttercream swirls on top and finish with chocolate truffles or nuts. Add fresh mint leaves for a touch of elegance.
Tips for Success
- Flat layers: Level cakes with a serrated knife if they dome in the oven.
- Chill before dripping: A chilled cake helps the ganache set beautifully without melting the frosting.
- Flavor boost: Add a teaspoon of espresso powder to the cake batter for deeper chocolate flavor.
- Storage: Store covered in the fridge for up to 3 days, but bring to room temperature before serving for the best texture.
Estimated Nutrition (per serving)
- Calories: ~420 kcal
- Carbohydrates: 58 g
- Protein: 5 g
- Fat: 20 g
- Sugar: 45 g
(Values may vary depending on toppings and portion size.)
Common Mistakes to Avoid
- Frosting warm cake: Warm layers melt the buttercream. Wait until all three layers are fully cool.
- Using hot ganache: Let it cool to a pourable consistency. Test a small drip before adding it around the edge.
- Uneven batter portions: Divide the batter evenly so the layers finish baking at similar times.
- Dense buttercream: Start with softened butter, add powdered sugar gradually and beat until smooth.
Make-Ahead and Storage
Store the finished cake covered in the refrigerator for up to 3 days. Let a serving soften toward room temperature before eating for a softer buttercream texture. You can bake the layers in advance; cool completely and wrap them well before storing.
Frequently Asked Questions
Can I replace the hot coffee with water?
Yes. The recipe allows 1 cup of hot water instead of hot coffee. Keep the liquid amount the same; the chocolate flavor will be a little different.
Why is the chocolate cake batter thin?
The hot coffee or water makes this batter thin by design. Divide it evenly among the prepared pans rather than adding extra flour.
How do I stop the ganache from melting the frosting?
Chill the frosted cake, then let the ganache cool until it flows slowly without feeling hot. Try one drip at the edge before finishing the cake.
Do I need to add the chocolate truffles and mint?
No. They are decorative toppings. The cake, buttercream and ganache can be served without them.