Potato Flour Sponge Cake - cooking recipe

Ingredients

4 eggs
1 c. sugar
3/4 c. potato flour
1 tsp. baking powder
1 Tbsp. lemon juice
Flavor to suit taste

Preparation

Separate eggs; beat whites to stiff froth and yolks to a velvet cream.
Add sugar to beaten yolks, stir well, then add to stiffly beaten whites.
Add flour and baking powder which has been sifted three times; add flavoring.
Bake in moderate oven about 30 minutes.