01 -
Put the oven on 350°F (177°C). Grease two 8-inch pans lightly, making sure to line their bases with parchment paper.
02 -
Stir together the flour, baking powder, cocoa powder, baking soda, espresso powder, and salt in a large bowl.
03 -
In another big bowl, throw in the butter (melted), oil, milk, vanilla, sugars, eggs, and sour cream. Whisk until smooth and combined.
04 -
Take turns adding the dry mix and warm coffee to the wet mix, starting and ending with dry. Gently mix each addition until it just comes together before adding the next.
05 -
Divide batter evenly into the two pans, around 675g each. Bake for 33-38 minutes. Let the cakes cool in the pans for 15 minutes before moving them to a rack to fully cool, taking about 30-60 minutes more.
06 -
In a small pot, mix the brewed coffee, water, sugar, vanilla, and cocoa (sifted). Heat on medium-high until it reduces to about ½ cup in 4-5 minutes. Let it cool down.
07 -
If you'd like, shave off the top crust of the cakes so they soak up the syrup better.
08 -
Once the syrup's warm or cool, use 2-3 tablespoons (30-45 ml) to coat each cooled cake layer. Chill the layers for an hour or two before frosting.
09 -
Whip the softened butter for a couple of minutes, then scrape down the bowl. Stir in the coffee, cream, salt, and vanilla. Slowly add powdered sugar a bit at a time, mixing until smooth. At the end, beat for 30-60 seconds at a higher speed.
10 -
Spread a dab of frosting on a serving plate to hold the bottom layer steady. Add the first cake and coat its top evenly with frosting. Stack the second cake layer and frost its top and sides, just enough for a crumb coat.
11 -
Pop the cake in the fridge for 20-30 minutes so the crumb coat firms up. Then, add your final frosting layer and tidy it up.