1. Preheat and Prepare

• Preheat oven to 350°F (175°C)
• Grease and line two 9-inch round cake pans with parchment paper
• Lightly flour the pans or use non-stick spray to ensure easy release

2. Mix the Dry Ingredients

• In a large mixing bowl, whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt
• Set aside while preparing wet ingredients

3. Combine the Wet Ingredients

• In a separate bowl, whisk together buttermilk, vegetable oil, eggs, and vanilla extract until smooth
• Slowly pour the wet mixture into the dry ingredients and stir to combine

4. Add Hot Liquid

• Gradually add hot brewed coffee (or hot water) to the batter
• Mix until smooth — batter will be thin, which helps create a moist texture

5. Bake the Cake

• Divide batter evenly between the prepared pans
• Bake for 30–35 minutes or until a toothpick inserted in the center comes out clean
• Let cakes cool in pans for 10 minutes, then remove and cool completely on wire racks

6. Make the Chocolate Ganache

• In a saucepan or microwave-safe bowl, heat cream until just simmering
• Pour over chocolate chips and let sit for 2–3 minutes
• Stir until smooth and glossy, then cool slightly until thickened but still spreadable

7. Make the Chocolate Buttercream

• In a large bowl, beat softened butter until creamy
• Add cocoa powder and beat until smooth
• Gradually add powdered sugar, one cup at a time, mixing after each addition
• Add milk or cream as needed for consistency
• Mix in vanilla extract and a pinch of salt
• Beat for 3–4 minutes until light and fluffy

8. Assemble the Cake

• Place one cake layer on a serving plate or cake board
• Spread a thick layer of chocolate ganache over the top
• Add the second cake layer and press gently
• Apply a crumb coat of buttercream and chill for 15 minutes
• Frost the entire cake with the remaining buttercream
• Smooth the sides or create decorative swirls with an offset spatula

9. Add Toppings and Garnishes

• Decorate with chocolate curls, chips, or a drizzle of ganache if desired
• Dust with cocoa powder or powdered sugar for a dramatic finish
• Chill until ready to serve or let sit at room temperature for a softer texture