1 stick butter
1 c. shortening
1 c. boiling water
4 tbsp. cocoa
2 c. flour
2 c. sugar
2 eggs
1/2 c. buttermilk
1 tsp. cinnamon
1 tsp. baking soda

Mix first 4 ingredients until blended. Put flour and sugar into large bowl. Pour first mixture over flour mixture. Add eggs, buttermilk, cinnamon and soda. Mix well. Bake in 9 x 13 inch pan at 400 degrees for 25 minutes. Frost while hot.

SHEET CAKE ICING:

1 stick butter
4 tbsp. cocoa
6 tbsp. milk
1 lb. powdered sugar
1 tsp. vanilla
1 c. nuts (optional)