Ingredients
For the Cake Layers:
- 1¾ cups (220g) all-purpose flour
- ¾ cup (65g) dark cocoa powder
- 2 cups (400g) granulated sugar
- 1½ tsp baking powder
- 1½ tsp baking soda
- 1 tsp salt
- 2 large eggs
- 1 cup (240ml) buttermilk, room temperature
- ½ cup (120ml) vegetable oil
- 2 tsp vanilla extract
- 1 cup (240ml) hot coffee or boiling water
For the Blackberry Compote:
- 2 cups fresh or frozen blackberries
- ⅓ cup (65g) granulated sugar
- 2 tbsp water
- 1 tsp lemon juice
For the Chocolate Ganache Filling:
- 8 oz (225g) dark chocolate, finely chopped
- 1 cup (240ml) heavy cream
For the Blackberry Buttercream:
- 1 cup (225g) unsalted butter, room temperature
- 4 cups (500g) powdered sugar, sifted
- ¼ cup (60ml) blackberry compote (from above)
- 2-3 tbsp heavy cream
For Decoration:
- Fresh blackberries
- Dark chocolate shards or curls
- Edible flowers (optional)
Instructions
Step 1: Make the Cake Layers
Preheat the oven to 350°F (175°C). Grease and line two 9-inch (23cm) round cake pans with parchment paper.
In a large bowl, sift together the flour, cocoa powder, sugar, baking powder, baking soda, and salt.
In
another bowl, whisk the eggs, buttermilk, oil, and vanilla. Gradually
mix the wet ingredients into the dry ingredients until combined.
Stir in the hot coffee or water until the batter is smooth. Divide evenly between the prepared pans.
Bake for 35-40 minutes or until a toothpick inserted into the center comes out clean. Cool completely before assembling.
Step 2: Prepare the Blackberry Compote
Combine blackberries, sugar, water, and lemon juice in a small saucepan over medium heat.
Cook
until the blackberries break down and the mixture thickens, about 8-10
minutes. Mash lightly for a textured compote or strain for a smooth
sauce. Cool completely.
Step 3: Make the Chocolate Ganache Filling
Heat
the heavy cream in a small saucepan until it begins to simmer. Pour it
over the chopped dark chocolate and let sit for 2 minutes.
Stir until smooth and glossy. Chill until thickened but still spreadable.
Step 4: Prepare the Blackberry Buttercream
Beat the butter until light and fluffy. Gradually add the powdered sugar and beat until combined.
Add the blackberry compote and mix until smooth. Adjust consistency with heavy cream if needed.
Step 5: Assemble the Cake
Place one cake layer on a serving platter. Spread a thin layer of ganache, then a layer of blackberry buttercream.
Add the second cake layer and repeat. Frost the top and sides of the cake with the remaining buttercream.
Step 6: Decorate
Garnish the cake with fresh blackberries, chocolate shards, and edible flowers for a romantic touch.
Chill the cake for at least 2 hours before slicing to allow flavors to meld.
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