1 c. flour
1/2 c. sugar
1 1/2 tsp. baking powder
1/4 tsp. salt
4 eggs, separated
1/4 c. oil
1/4 c. water
1 tsp. vanilla
1/2 tsp. cream of tartar
1/2 c. sugar

Combine first 4 ingredients in small bowl. Make a well in center; add egg yolks and next 3 ingredients. Beat at high speed 5 minutes until smooth. Combine egg whites and cream of tartar in large bowl. Beat until soft peaks form. add 1/2 cup sugar, 2 tablespoons at a time. Beat 4 minutes at medium speed until stiff peaks. Pour egg yolk mix in a thin stream over egg whites; gently fold yolk mix into whites. Pour batter into ungreased tube pan. Spread evenly. Bake 375 degrees for 1 hour until it springs back. Remove from the oven. Invert the pan. Cool completely. Serves 16.