Cherry Pineapple Cake
["1 box Duncan Hines white cake mix", "4 egg yolks", "1/3 c. oil", "1 1/4 c. water"]
["Beat until smooth.", "Pour into 3 cake pans.", "Bake at 325\u00b0 until done."]
["white cake", "egg yolks", "oil", "water"]