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

FROSTING:

1 stick butter
4 tbsp. cocoa
5 tbsp. milk
1 box powdered sugar
1 tsp. vanilla
1/2 c. nuts, chopped

Sift together in large bowl the flour and sugar. In saucepan, bring to a rapid boil 1 stick butter, shortening, cocoa and water. Pour over flour mixture; blend well. Add soda, buttermilk, salt, cinnamon, vanilla and eggs. Mix well and pour into lightly greased and floured 10 1/2" x 15 1/2" sheet cake pan. Bake 20 to 25 minutes in 400 degree oven.

FROSTING: Bring to a boil butter, cocoa and milk. Remove from heat and add powdered sugar, vanilla and nuts; mix well. For best results, frost cake while still quite warm.