Grandma'S Mahogany Chiffon
["3/4 c. boiling water", "1/2 c. cocoa", "1 3/4 c. Gold Medal flour (sift if lumpy)", "1 2/3 c. sugar", "1 1/2 tsp. soda", "1 tsp. salt", "1/2 c. oil", "7 unbeaten egg yolks", "2 tsp. vanilla", "7 egg whites (beat with 1/2 tsp. cream of tartar)"]
["Baking Temperature: 325\u00b0 and 350\u00b0.", "Baking Time: 55 minutes and 10 minutes until done."]
["boiling water", "cocoa", "Gold Medal flour", "sugar", "soda", "salt", "oil", "egg yolks", "vanilla", "egg whites"]