Chocolate Cake
["1/2 c. cocoa", "1 c. hot water", "2 c. flour", "2 1/2 tsp. soda", "1 tsp. salt", "2 c. sugar", "1 c. oil", "2 eggs", "1 c. buttermilk", "1 tsp. vanilla"]
["Mix cocoa in hot water; add remaining ingredients; beat well. Pour into ungreased 9 x 13-inch pan.", "Bake in 350\u00b0 oven for 45 minutes.", "Remove from oven, cool slightly and frost."]
["cocoa", "water", "flour", "soda", "salt", "sugar", "oil", "eggs", "buttermilk", "vanilla"]