Preheat oven to 350. Grease and line three 9" round cake pans with parchment.
Melt chocolate in freshly brewed coffee/espresso. Add in the finely crushed coffee powder and stir until it has dissolved. Set aside.
Sift dry ingredients three times. Cream butter and sugar until light.
Add egg yolks one at a time into the butter mixture, beating well after each. Blend in vanilla and melted chocolate.
Add flour mixture alternating with buttermilk beating well after each addition.
In a clean mixing bowl, beat egg whites until stiff peaks form. Gently fold egg whites into batter mixture and pour into prepared pans. Bake for 25 - 30 minutes or until toothpick comes out clean when tested.
Let cool in pan for 15 minutes before attempting to remove.