Ingredients
Method
Prepare the Filling Base
- In a medium saucepan, whisk together sugar, flour, and salt.
- Gradually add milk while whisking to ensure no lumps.
- Cook over medium heat, stirring constantly, until the mixture thickens to a pudding-like consistency.
- Pour the mixture into a heat-proof container, press wax paper onto the surface, and let cool to room temperature.
Make the Cake
- Preheat oven to 350°F (175°C). Line two 8-inch round cake pans with parchment paper and grease the sides.
- In a large bowl, combine flour, brown sugar, granulated sugar, cocoa powder, baking soda, and salt.
- Add melted butter and oil. Stir until well combined.
- Beat in eggs, egg yolk, and vanilla extract. Mix until smooth.
- Gradually stir in buttermilk, followed by hot coffee. Mix well.
- Divide the batter evenly between the pans and bake for 33–35 minutes, or until a toothpick comes out clean.
- Let cakes cool in pans for 15 minutes, then transfer to a wire rack to cool completely.
- Prepare the Filling
- Beat softened butter in a large bowl until fluffy.
- Gradually add the cooled filling base, one spoonful at a time, mixing thoroughly after each addition.
- Stir in vanilla extract and whip until smooth and airy. Chill for 10–20 minutes before using.
Make the Ganache Frosting
- Combine chocolate and heavy cream in a microwave-safe bowl. Heat for 35 seconds, stir, and repeat in 25-second intervals until smooth.
- Let the ganache cool to a spreadable consistency.
Assemble the Cake
- Level the cooled cake layers if necessary.
- Place the first layer on a serving plate and spread the filling evenly over the top.
- Add the second layer and smooth the sides.
- Freeze the cake for 10–15 minutes to firm it up.
- Spread ganache evenly over the top and sides of the cake. Chill for 15 minutes b
Notes
- Ensure the filling base is completely cool before adding it to the butter to avoid melting.
- If the ganache becomes too firm while assembling, microwave it for 5–10 seconds to soften.
- For best results, use high-quality chocolate for the ganache and room-temperature ingredients for the batter and filling.