01 -
Heat your oven to 350°F (177°C). Grease a 6-inch round cake pan, put parchment paper inside, then grease the paper too.
02 -
Stir flour, cocoa powder, baking soda, espresso powder, and salt together in a big bowl.
03 -
In another bowl, mix oil, sugar, egg, vanilla, and buttermilk until they're all combined. Pour this into your dry mix and stir until it's smooth.
04 -
Empty the batter into your ready pan. Cook for 27-30 minutes until a toothpick stuck in the middle comes out clean. Let it cool completely on a wire rack.
05 -
Warm the cream and pour it over your chopped chocolate. Wait 2-3 minutes, then stir until it's smooth. Let it cool for 30-60 minutes to thicken up.
06 -
Put the ganache on top of your cooled cake. Add raspberries, mint, or sprinkles if you want.