Plain Sponge Cake - cooking recipe

Ingredients

4 egg yolks
2 c. sugar
1 c. sifted flour
4 egg whites, beaten stiff
1 c. sifted flour
2 tsp. baking powder
a scant teacupful boiling water
flavor
salt

Preparation

Beat the yolks of eggs with two cups of sugar.
Stir in gradually 1 cup of sifted flour and the whites of 4 eggs, beaten stiff, then a cup of sifted flour in which two teaspoons of baking powder has been stirred and lastly, a scant teacupful of boiling water, stirred in a little at a time.
Flavor and add salt. However thin the mixture may seem do not add any more flour.
Bake at 350\u00b0 for 25 minutes, then 375\u00b0 for 10 minutes.