01 -
Preheat oven to 177°C. Grease two 23-cm round cake pans and line the bases with parchment paper rounds. Grease the parchment as well to ensure easy release.
02 -
In a large mixing bowl, whisk together all-purpose flour, cocoa powder, granulated sugar, baking soda, baking powder, salt, and espresso powder (if using) until evenly combined.
03 -
In a separate bowl, use an electric mixer or whisk to thoroughly blend vegetable oil, eggs, and vanilla extract. Mix in buttermilk until incorporated.
04 -
Pour the wet ingredients into the dry mixture. Add hot coffee and mix on low speed until batter is completely combined and smooth. The batter will be thin.
05 -
Divide the batter evenly between prepared pans. Bake for 23–26 minutes or until a toothpick inserted in the center emerges clean. Baking times may vary.
06 -
Remove cakes from the oven and place pans on a wire rack. Allow cakes to cool completely in the pans before turning out.
07 -
Beat softened butter with a mixer on medium speed until creamy (about 2 minutes). Add confectioners’ sugar, cocoa powder, 45 ml heavy cream, salt, and vanilla. Mix on low for 30 seconds, then increase to high and beat for 1 minute. If frosting is too thin, add more confectioners' sugar or cocoa powder; if too thick, add additional cream in small amounts.
08 -
If cake layers are domed, level tops using a large serrated knife. Place one layer on a cake stand or plate. Spread with buttercream, add the second layer, and cover the top and sides with remaining frosting.
09 -
Garnish cake with chocolate chips if desired. Refrigerate uncovered for 30–60 minutes to set the shape before slicing.
10 -
Serve at room temperature or chilled. Store tightly covered cake in the refrigerator for up to 5 days.