01 -
In a large bowl, whisk together flour, granulated sugar, brown sugar, cocoa powder, baking soda, baking powder, and salt until fully blended and lump-free.
02 -
In a separate bowl, whisk eggs, buttermilk, vegetable oil, brewed coffee, and vanilla extract until smooth.
03 -
Pour wet mixture into dry ingredients and stir gently until no dry streaks remain; avoid overmixing to maintain tender crumb.
04 -
Divide batter evenly into three greased and parchment-lined 8-inch round cake pans, tapping each gently to release air bubbles.
05 -
Bake in a preheated oven at 350°F (177°C) for 30 to 35 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
06 -
Allow cakes to cool in pans for 10 minutes, then transfer to wire racks to cool completely before frosting.
07 -
Melt chocolate chips with honey and heavy cream over a double boiler or in short microwave intervals; let cool slightly to thicken.
08 -
Beat room temperature butter in a large bowl until smooth and fluffy.
09 -
Add powdered sugar, cocoa powder, and salt; beat until combined. Mix in melted chocolate mixture and vanilla extract until smooth.
10 -
Place one cake layer on a serving plate and spread frosting generously over the top.
11 -
Repeat layering with remaining cakes, covering sides and top with frosting; optionally garnish with chocolate shavings or sprinkles.