Black Magic Cake

Ingredients
1 3/4 c all purpose flour
2 c sugar
3/4 c cocoa powder
2 tsp baking soda
1 tsp baking powder
1 tsp salt
2 eggs
1 c strong black coffee, cooled
1 c buttermilk
1/2 c vegetable oil
1 tsp real vanilla extract

CHOCOLATE FROSTING
1/2 c margarine, softened
2 oz melted unsweetened chocolate, cooled
3 c powdered sugar
3 Tbsp milk
2 tsp real vanilla extract  

Directions
Combine flour, sugar, cocoa, baking soda, baking powder, and salt in a large mixing bowl or stand mixer. Add eggs, coffee, buttermilk, oil, and vanilla. Beat at medium speed for two minutes. Batter will be thin. Pour batter into a greased and floured 9x13 pan or two 9 inch cake pans. Bake at 350 degrees for 35-40 minutes for a 9x13, or 30-35 minutes for layer pans. Combine frosting ingredients and mix with a hand or stand mixer. Spread frosting on cooled cakes.