Buttermilk Chocolate Cake
["2 c. sugar", "2 1/2 c. flour", "1 tsp. baking powder", "4 Tbsp. cocoa", "1/2 tsp. salt", "1 c. vegetable oil", "4 egg whites", "1 c. buttermilk or sour milk", "1 tsp. vanilla", "2 tsp. baking soda in 1 c. hot water"]
["Mix all ingredients together and bake at 350\u00b0."]
["sugar", "flour", "baking powder", "cocoa", "salt", "vegetable oil", "egg whites", "buttermilk", "vanilla", "baking soda"]