Black Magic Cake

1 3/4 cups all-purpose flour, sifted
2 cups granulated sugar
3/4 cup cocoa
1 teaspoon baking powder
2 teaspoons baking soda
2 eggs
1 cup hot black coffee
1 cup buttermilk or sour milk
1/2 cup vegetable oil
1 teaspoon vanilla extract

To sour milk, use 1 tablespoon vinegar plus milk to equal 1 cup. In a large bowl, combine flour, sugar, cocoa, baking soda, baking powder and salt. Add eggs, coffee, milk oil and vanilla extract. Batter will be very thin. Bake in a greased and floured 13 x 9-inch pan at 350 degrees F for 35 to 40 minutes.