Sponge Cake - cooking recipe

Ingredients

5 egg whites, beaten stiffly
5 egg yolks, beaten
2 c. granulated sugar
2 c. sifted flour
2 1/2 tsp. baking powder
1 c. boiling water
1 tsp. vanilla

Preparation

Add beaten egg yolks to beaten egg whites.
Gradually add sugar and beat 5 minutes.
Blend in 1 cup flour.
Slowly add 1 cup boiling water.
Blend in remainder of the flour, baking powder and vanilla until smooth.
Pour into ungreased angel food pan.
Bake 45 minutes at 350\u00b0.