01 -
Heat your oven to 350°F. Butter three 8-inch round cake pans and put parchment paper on the bottoms.
02 -
Mix the flour, white sugar, baking soda, baking powder, and salt together in a big bowl.
03 -
Pour in buttermilk, vegetable oil, eggs, and vanilla extract to your dry mix. Stir until everything's well combined.
04 -
Slowly add the hot coffee and mix until your batter looks smooth and runny.
05 -
Pour equal amounts of batter into your ready pans. Bake for 30-35 minutes. Check if it's done by sticking a toothpick in the middle - it should come out clean.
06 -
Let the cakes sit in their pans for 10 minutes, then take them out and put them on a wire rack until they're completely cool.
07 -
Warm the heavy cream in a pot over medium heat until it's steamy but not bubbling.
08 -
Pour the warm cream over your chopped chocolate in a bowl. Wait 2 minutes, then stir until it's all melted and smooth. Add the butter and mix until it looks shiny.
09 -
Spread the cooled chocolate mix between your cake layers and all over the outside for a nice finish. Add any decorations you want.