Ingredients
Equipment
Method
Step 1: Prepare the Vanilla Sponge
Preheat your oven to 175°C (350°F). Grease two 8-inch round cake pans and line the bottoms with parchment paper. In a medium bowl, whisk together the cake flour, baking powder, and a pinch of salt. In the bowl of your stand mixer, beat the softened unsalted butter and 1.5 cups of granulated sugar on medium-high speed until pale and fluffy (about 4 minutes). Add the room-temperature eggs one at a time, beating well after each addition, followed by the vanilla extract.Step 2: Incorporate Dry Ingredients
Reduce the mixer speed to low. Gradually add the dry flour mixture in three additions, alternating with the whole milk, beginning and ending with the dry ingredients. Mix just until the batter is smooth and combined—overmixing will develop the gluten and result in a dense cake that cannot properly absorb the coffee. Divide the batter evenly between the prepared pans and smooth the tops with your offset spatula.Step 3: Bake and Cool
Bake the layers on the middle rack of your oven for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean. Remove the pans from the oven and let the cakes cool for 10 minutes before turning them out onto wire racks to cool completely. Never attempt to soak or frost warm cakes; patience here is the foundation of mastering the art of traditional layer cakes.Step 4: Create the Espresso Soak
While the cakes cool, prepare your soaking syrup. In a small bowl, combine the completely cooled strong brewed espresso with the coffee liqueur (if using) and 1 tablespoon of sugar. Stir until the sugar is fully dissolved. Set this mixture aside. Using a high-quality espresso ensures the deep, roasted notes pierce through the sweet mascarpone later on.Step 5: Whip the Mascarpone Frosting
In a chilled mixing bowl, combine the cold heavy whipping cream, powdered sugar, and vanilla extract. Whip on medium-high speed until soft peaks form. Gently fold in the cold mascarpone cheese and continue whipping just until the frosting holds firm, pipeable peaks. Be incredibly careful during this step—over-whipping mascarpone will cause the fat to separate and the frosting to curdle instantly.Step 6: Assemble and Soak the Layers
Place the first completely cooled cake layer on your serving platter or cake stand. Using your silicone pastry brush, generously dab half of the espresso mixture over the surface of the sponge, allowing it to soak in. Spread a thick, even layer of the mascarpone frosting over the soaked cake. Place the second cake layer on top and repeat the soaking process with the remaining espresso.Step 7: Frost, Chill, and Garnish
Use the remaining mascarpone frosting to coat the top and sides of the cake smoothly. You can use your offset spatula to create rustic swirls or a sleek, modern edge. Once frosted, place the cake in the refrigerator uncovered for at least 4 hours to allow the layers to meld and the frosting to stabilize. Right before serving, use a fine mesh sieve to generously dust the top with Dutch-processed cocoa powder.
