Easy Chocolate Cake
["1 egg", "1/2 c. cocoa", "1/2 c. shortening*", "1 1/2 c. flour", "1/2 c. sour milk", "1 tsp. each: baking powder, salt and baking soda", "1 c. sugar", "1/2 c. boiling water"]
["Mix ingredients in the order given.", "Mix when all ingredients are in the bowl, starting with the egg and ending with the boiling water.", "Place in two 9-inch cake tins.", "Bake in a 350\u00b0 oven for 25 to 30 minutes.", "Frost when cool."]
["egg", "cocoa", "shortening", "flour", "sour milk", "baking powder", "sugar", "boiling water"]