Step 1

Combine flour, sugar, cocoa, baking soda, baking powder, and salt in a large mixing bowl or stand mixer.

Step 2

Add eggs, coffee, buttermilk, oil, and vanilla. Beat at medium speed for two minutes. The batter will be thin.

Step 3

Pour batter into a greased and floured 9x13 pan or two 9 inch cake pans.

Step 4

Bake at 350 degrees for 35-40 minutes for a 9x13, or 30-35 minutes for layer pans.

Step 5

Combine frosting ingredients and mix with a hand or stand mixer.

Step 6

Spread frosting on cooled cake.