2 1/4 c. Softasilk cake flour
1 1/2 c. sugar
3 tsp. baking powder
1 tsp. salt
1/2 c. vegetable oil
5 egg yolks
3/4 c. cold water
2 tsp. vanilla
2 tsp. grated lemon rind
1 c. egg whites (7 or 8)
1/2 tsp. cream of tartar

Heat oven to 325 degrees. Mix flour, sugar, baking powder, and salt in bowl. Make a well and add in order, oil, egg yolk, water, vanilla, lemon rind. Beat with spoon until smooth. In large mixing bowl beat egg whites and cream of tartar until very stiff. Pour egg yolk mixture gradually over beaten whites, gently folding until blended. Pour into 10" tube pan. Bake 55 minutes.