Orange Chiffon Cake
["2 c. flour", "1 1/2 c. sugar", "1 Tbsp. baking powder", "1 tsp. salt", "1/2 c. oil", "7 egg yolks", "3/4 c. cold water", "3 Tbsp. grated orange rind", "1 c. egg whites", "1/2 tsp. cream of tartar"]
["Sift flour, sugar, baking powder and salt into a bowl.", "Make well in the center.", "Place oil, unbeaten egg yolks, cold water and orange rind in well; beat with a spoon until smooth."]
["flour", "sugar", "baking powder", "salt", "oil", "egg yolks", "cold water", "orange rind", "egg whites", "cream of tartar"]