01 -
Preheat the oven to 350°F (177°C). Lightly grease and line the bottom of two 8-inch cake pans with parchment paper.
02 -
In a large bowl, whisk together the flour, cocoa powder, baking powder, baking soda, espresso powder, and salt until well combined.
03 -
In another large bowl, add the oil, melted butter, granulated sugar, light brown sugar, eggs, sour cream, milk, and vanilla extract. Whisk until smooth and well combined.
04 -
Sift the dry ingredients into the wet ingredients, alternating with the warm coffee in this order: dry, coffee, dry, coffee, dry. Whisk each addition until just combined before adding the next.
05 -
Evenly divide the batter between the prepared cake pans, approximately 675g per pan. Bake for 33-38 minutes. Cool in pans for 15 minutes, then transfer to a rack to cool completely for 30-60 minutes.
06 -
While the cakes cool, whisk together water, brewed coffee, sugar, sifted cocoa powder, and vanilla extract in a small saucepan. Bring to a boil over medium-high heat for 4-5 minutes until thickened and reduced to about ½ cup. Cool to room temperature.
07 -
Evenly trim the top crust off each cake layer if desired, then brush 2-3 tablespoons (30-45 ml) of the cooled syrup over each cooled and leveled cake. Refrigerate cakes for 1-2 hours before frosting.
08 -
Cream the softened butter until smooth, about 1-2 minutes on low speed. Add vanilla extract, salt, brewed espresso, and heavy cream. Gradually add sifted powdered sugar ½ cup (60 g) at a time, mixing until fully incorporated. Beat on medium-high for 30-60 seconds until the desired consistency is achieved.
09 -
Spread a small amount of frosting onto the serving plate to anchor the cake. Place the first layer of cake on top. Frost the first layer, then place the second layer on top. Apply a crumb coat of frosting to the top and sides, then refrigerate for 20-30 minutes to set.
10 -
Apply a final layer of frosting evenly over the cake. Smooth the surface with a spatula and garnish as desired before serving.