Chocolate Blackout Cake

Ingredients for the frosting:
1 3/4 cups all purpose flour
2 cups sugar
3/4 cup cocoa powder
2 teaspoon baking soda
1 teaspoon baking powder
1 teaspoon salt
2 eggs
1 cup strong black coffee, cooled
1 cup buttermilk
1/2 cup vegetable oil
1 teaspoon vanilla extract

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Ingredients for the frosting:
1/2 cup butter, softened
2 ounces melted unsweetened chocolate, cooled
3 cups powdered sugar
3 T milk
2 teaspoons vanilla extract

Preparing the cake:
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 9- by 13-inch pan or two 9-inch cake pans. Bake at 350 degrees F for 35 to 40 minutes for a 9-inch by 13-inch, or 30 to 35 minutes for layer pans.

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Preparing the frosting:
Combine frosting ingredients and mix with a hand or stand mixer. Spread frosting on cooled cakes.