Instructions: Preheat oven to 400 degrees. Combine in a saucepan; cocoa, butter, oil and water. Bring to a boil. Let cool. Combine sugar and flour in a large bowl.

Pour cocoa mixture, when cooled, over flour and sugar. Beat until smooth.

Combine buttermilk, eggs, baking soda, cinnamon and vanilla. Beat into the cocoa mixture. Grease and flour a 9 x 13 inch pan. Pour cake batter into pan. Bake at 400 degrees for 35 - 40 minutes.

Frosting: Start 10 minutes before baking is done. Combine frosting ingredients in a pan, except confectioners sugar. Heat until butter melts.

Add confectioners sugar. Stir well, then beat until thick. Spoon frosting over hot cake. Top with nuts, if desired.

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