Golden Chiffon Cake
["2 1/4 c. sifted cake flour", "1 1/2 c. sugar", "1 Tbsp. baking powder", "1 tsp. salt", "1/2 c. cooking oil", "5 egg yolks", "3/4 c. water", "2 tsp. finely shredded lemon peel", "1 tsp. vanilla", "8 egg whites", "1/2 tsp. cream of tartar"]
["In a small bowl sift together cake flour, sugar, baking powder, and salt; Make a well in the center. Add cooking oil, egg yolks, water, lemon peel, and vanilla. Beat mixture at high speed with electric mixer about 5 minutes or until satin smooth. Wash beaters. Make sure they are completely dry before next step."]
["cake flour", "sugar", "baking powder", "salt", "cooking oil", "egg yolks", "water", "lemon peel", "vanilla", "egg whites", "cream of tartar"]