Preheat the oven to 350°F, and line three 8" cake pans with parchment.
In the bowl of a stand mixer fitted with the paddle attachment, combine the sugar, flour, cocoa, baking soda, baking powder and salt. Mix on low until dry ingredients are thoroughly combined.
On low speed add eggs, buttermilk, coffee, oil and vanilla.
Once everything is combined beat on medium speed for 1 minute.
Divide batter evenly between the three pans.
Bake for 20-24 minutes, or until wooden toothpick comes out clean.
Place on a cooling rack to cool.