Chocolate Sheath Cake
["2 c. sugar", "2 c. cake flour", "2 sticks margarine", "4 Tbsp. cocoa", "1 c. water", "1/2 c. buttermilk", "2 eggs, lightly beaten", "1 tsp. soda", "1 tsp. cinnamon", "1 tsp. vanilla"]
["Sift together in a large bowl the sugar and flour.", "In saucepan mix margarine, cocoa and water.", "Bring to a boil.", "Pour over flour and sugar. Mix well.", "Add remaining 5 ingredients.", "Mix well. Pour in a greased 11 x 16-inch pan.", "Bake 20 minutes at 400\u00b0.", "Begin making icing about 5 minutes before cake is done."]
["sugar", "cake flour", "margarine", "cocoa", "water", "buttermilk", "eggs", "soda", "cinnamon", "vanilla"]