In a large bowl combine the sugar, flour, cocoa powder, baking powder, baking soda, and salt.
In a different large bowl, whisk together the eggs, coffee, milk, oil, and vanilla extract.
Add the wet ingredients to the dry ingredients and whisk, until combined.
Pour the batter into your pans (it will be very watery) and bake for about 35 minutes.
Poke a toothpick into the center, if it comes out clean your cake is done. If it doesn't, add another 5-10 minutes to the bake time.
Once your cakes are done, wrap them in plastic and refrigerate until they are completely cool!