Cake

Grease and flour a 10" cast iron skillet; set aside. In a large bowl, combine flour, sugar, baking soda, and salt; set aside.

In a medium saucepan combine 1 cup butter, 1/3 cup cocoa, and 1 cup of water. Bring mixture to a boil, stirring constantly. Remove from heat. With an electric hand-held mixer on medium speed, beat chocolate mixture into the dry mixture until thoroughly blended. Add eggs, 1/2 cup of buttermilk, and 1 1/2 teaspoons of vanilla. Beat for 1 minute (batter will be thin). Pour batter into the prepared pan.

Bake in a 350° oven about 30 to 35 minutes, or until a wooden pick or cake tester inserted in center comes out clean.

Pour warm chocolate frosting over the warm cake, spreading evenly. Place cake in pan on a wire rack; cool thoroughly before cutting.