Heat oven to 350. Greese and flour two 9-inch round baking pans or one 13 x 9 x 2- inch baking pan.
Stir together sugar , flour, cocoa , baking soda , baking powder and salt in large bowl. Add eggs , butter milk, coffee, oil and vanilla, beat on medium speed of mixer for 2 mins. (batter will be thin). pour batter evenly into prepared pans.
Bake 30-35 mins. for round pans , 35-40 mins. for rectangular pan or until toothpick inserted. in center comes out clean. Cool for 10 minutes , remove from pans to wire racks. Cool completely. frost with mocha frosting (its the best).