Cake Ingredients  2 cups flour  2 cups sugar  2 sticks of unsalted butter  6 tablespoons Hershey's Cocoa powder  1 cup water  1 teaspoon baking soda  1/2 cup buttermilk  1/2 teaspoon salt  1/2 teaspoon cinnamon  1/2 teaspoon vanilla  2 eggs   Sift flour and sugar together in a large mixing bowl.  In a small saucepan, combine butter, cocoa, and water.  Bring to a rapid boil.  Pour the mixture over the flour and sugar.  Mix well.   Combine buttermilk and baking soda in measuring cup.  Lightly beat the eggs and add in buttermilk/soda mixture.  Mix well.   Add salt, cinnamon, and vanilla to mixing bowl.  Mix well.   Last add everything in the sugar/flour/chocolate bowl to the mixer.  Mix well.   Pour into a greased 16 X 11 X 1 inch jelly roll pan.  Bake 20 minutes in a preheated 350 degree oven.   Frosting Ingredients  1 stick unsalted butter  5 tablespoons Hershey's cocoa powder  6 tablespoons cooked black coffee  1 pound box of powdered sugar  1 teaspoon vanilla  1 cup chopped pe...