01 -
Preheat the oven to 350°F. Prepare 8-inch cake pans by lining the bottoms with parchment paper or greasing and flouring them.
02 -
In a mixing bowl, sift together the flour, sugar, cocoa powder, baking soda, baking powder, and salt.
03 -
Add eggs, coffee, buttermilk, melted coconut oil, and vanilla extract to the dry ingredients. Mix on medium speed for about 2 minutes until well combined.
04 -
Divide the batter evenly into the prepared pans. Tap the pans gently on a countertop to release air bubbles. Bake for 20 minutes, rotate the pans, and bake for an additional 15 minutes or until a toothpick inserted in the center comes out clean.
05 -
Let the cake pans cool on a wire rack for 20 minutes. Remove the cakes from the pans and allow them to cool completely.
06 -
Whip the butter in a mixer for 3-4 minutes until light and fluffy. Gradually incorporate powdered sugar, coffee, and vanilla. Add espresso powder and mix well.
07 -
Combine dark chocolate chips and heavy whipping cream in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each, until smooth and melted. Allow to cool to room temperature to thicken.
08 -
Ensure all cake layers are flat and even. Place the first layer on a cake stand or board. Spread buttercream generously on top, then repeat with the next layers. Smooth the final buttercream layer for an even surface.
09 -
Spoon ganache onto the top of the cake, allowing it to spread naturally and slightly drip down the sides. Top with chopped Heath candy bars. Let set and admire.