Preheat oven to 350°F and line and grease two 9 or 8-inch round cake pans with parchment paper and cooking spray and set aside. Click for the photo instructions for lining round pans with parchment paper.
Combine the sugar, flour, cocoa powder, baking soda, baking powder, and salt in a large bowl or stand mixer fitted with a whisk attachment and mix together.
Beat in the eggs, buttermilk, coffee, oil, and vanilla and beat on medium speed for 2 minutes, the batter is going to be very thin.
Evenly divide the batter between the two pans and bake the cakes for 40 to 45 minutes until toothpick comes clean from center.
Cool in pans for at least 10 minutes and loosen from sides of pan before transferring to a cooling rack to cool completely. I like to use Bake Even Strips for a nice and evenly baked cake, but if your cakes dome, you’ll need to gently slice the tops of the cake off so they are level before assembling.