Lemon Fluff Cake
["2 1/2 c. sifted plain flour", "1 1/2 c. sugar", "1 Tbsp. baking powder", "1 tsp. salt", "1/2 c. salad oil", "6 eggs, separated", "3/4 c. cold water", "2 tsp. lemon juice", "1 tsp. lemon rind", "1/2 tsp. cream of tartar", "1 tsp. lemon extract"]
["Sift flour, baking powder, sugar and salt together in a bowl. Make a well; add oil, egg yolks, water, lemon juice and rind. Beat until smooth.", "Add cream of tartar to egg whites.", "Beat very, very stiff.", "Blend gently with cake mix.", "Pour into ungreased tube pan.", "Bake at 350\u00b0 for 70 to 80 minutes.", "Remove when cool."]
["flour", "sugar", "baking powder", "salt", "salad oil", "eggs", "cold water", "lemon juice", "lemon rind", "cream of tartar", "lemon extract"]