Preheat oven to 350ºF, grease, and dust with cocoa powder 2x8” or 3X6" cake pans, and set aside.
Combine the flour, sugar, cocoa powder, baking powder, baking soda, and salt in the bowl of your stand mixer and mix on low for 1 minute.
2 cups All-purpose flour, 1½ teaspoon Baking powder, 1½ teaspoon Baking soda, 2⅓ cups Sugar, 1 cup Cocoa powder, ½ teaspoon Salt
Mix the eggs, buttermilk, oil, mayonnaise, and vanilla in a separate bowl, then add to the flour mixture and mix on medium speed for 2 minutes. Scrape the bowl as needed.
2 Eggs, ½ cup Oil, 1 cup Buttermilk, ¼ cup Mayonnaise, 1 tablespoon Vanilla extract
Bring the speed down and add the hot coffee and mix until just mixed. DO NOT OVERMIX.
1 cup Coffee
The batter will be thin and that’s okay. Pour the batter into the prepared pans, and bake for 40-45 minutes until an insert into the center comes out clean.
Cool the cakes in the pan for about 15 minutes then invert onto wire racks to cool completely before frosting.
HOW TO MAKE CHOCOLATE FUDGE FROSTING
Heat the cream until just steaming and pour over chocolate Let it sit for 5 minutes and whisk until smooth.
¾ cup Heavy cream, 1¼ cup Semi-sweet chocolate chips
Place the softened butter and cream cheese in the bowl and set your whisk attachment. Whisk until smooth.
2 tablespoon Cream cheese, ¾ cup Butter
Sift the cocoa powder and powdered sugar into the butter and continue whisking. It will be dry and crumbly at first, continue to whisk until it becomes smooth.
½ cup Cocoa powder, 2-3 cups Powdered sugar
Add in the milk 1 tablespoon at a time. Then add vanilla and salt. Whisk on high until fluffy.
1 teaspoon Vanilla extract, 2-3 tablespoon Milk, ½ teaspoon Salt
whisk in the cooled chocolate ganache from step one. The frosting will be soft. Chill for 20 minutes if you want it to be firmer.
Notes
Make sure all the wet ingredients are at room temperature.
Sift the powdered sugar and the cocoa powder before using.