01 -
Set your oven to 350°F and line up two 9-inch round pans with parchment rounds.
02 -
Grab a whisk and blend together your flour, cocoa, sugar, soda, powder, salt, and espresso thoroughly.
03 -
Using a stand or hand mixer, mix the oil, eggs, and vanilla extract until smooth and together.
04 -
Pour your buttermilk into the wet mixture and stir until it’s blended in evenly.
05 -
Combine the wet stuff with the dry mixture, then pour in that hot coffee as you go.
06 -
Whisk everything up until you’ve got a smooth, loose batter (yep, it’ll feel thin!).
07 -
Split the batter across your prepared pans as evenly as you can, using a scale if you've got one.
08 -
Pop the pans in and bake for about 23-26 minutes, or until a toothpick in the middle comes out clean.
09 -
Let the cakes fully cool on a wire rack before you attempt to take them out of their pans.
10 -
Whip the butter with a mixer until it’s totally soft and creamy—it takes about 2 minutes.
11 -
Slowly add in powdered sugar, a little at a time, plus cocoa, cream, salt, and vanilla.
12 -
Mix it on low to start, then kick up the speed to high until the mixture gets thick and fluffy.
13 -
Trim any domes or uneven tops from the cake layers if necessary before stacking.
14 -
Layer the cakes with frosting in between, then spread the rest all over the outside.
15 -
Chill the whole cake for half an hour to an hour to help it hold its shape before slicing.