01 -
Whisk together the all-purpose flour, granulated sugar, brown sugar, cocoa powder, baking powder, baking soda, and salt in a large bowl until evenly blended and free of lumps.
02 -
In a separate bowl, beat the eggs, buttermilk, vegetable oil, coffee, and vanilla extract until smooth and homogeneous.
03 -
Pour the wet mixture over the dry ingredients and stir gently with a spatula until just combined, avoiding overmixing. Ensure no dry streaks remain.
04 -
Evenly distribute the batter among three greased and parchment-lined 8-inch round cake pans. Tap the pans firmly on the counter to release any trapped air bubbles.
05 -
Bake in a preheated 350°F (175°C) oven for 30 to 35 minutes, or until a toothpick inserted in the center comes out with just a few moist crumbs attached.
06 -
Allow the cakes to cool in their pans for 10 minutes, then invert onto wire racks and let cool completely before removing the parchment paper.
07 -
Combine chocolate chips, honey, and heavy cream in a microwave-safe bowl or over a double boiler. Heat together, stirring until smooth and glossy. Allow to cool slightly to thicken.
08 -
In a large bowl, beat room-temperature butter using an electric mixer until pale and fluffy, about 2 minutes.
09 -
Sift powdered sugar and cocoa powder over the butter with salt, then beat on low speed until fully incorporated.
10 -
Mix in the cooled melted chocolate mixture and vanilla extract. Beat until frosting is smooth and evenly blended.
11 -
Place one cake layer on a serving plate. Spread a generous layer of chocolate frosting over the top. Repeat with the second and third layers.
12 -
Coat the sides and top of the cake evenly with the remaining frosting. Garnish with chocolate shavings, sprinkles, or preferred toppings for an elegant finish.