3 heaping tbsp. cocoa
1/4 lb. butter
1/2 c. vegetable oil
1 c. water
2 c. sugar
2 c. flour
1/2 c. buttermilk
2 eggs
1 tsp. baking soda
1 tsp. cinnamon
1 tsp. vanilla

Frosting:

1 stick butter
3 heaping tbsp. cocoa
6 tbsp. milk
1 box confectioners sugar

In saucepan, combine cocoa, butter, oil and water. Bring to boil; let cool. Combine sugar and flour in a large bowl. Pour cooled cocoa mixture over flour and sugar; beat until smooth. Combine buttermilk, eggs, soda, cinnamon and vanilla; then beat into above mixture. Grease and flour 9 x 13-inch pan.

Bake at 400°F for 35 to 40 minutes.

Frosting: Combine butter, cocoa and milk in pan and heat until butter melts. Add confectioners sugar. Stir well, then beat until thick. Spread frosting over hot cake.