Potato Flour Sponge Cake - cooking recipe

Ingredients

4 eggs, separated
3/4 c. sugar
1/2 c. potato flour*
2 tsp. lemon juice

Preparation

Beat the egg whites until stiff.
Add sugar; continue beating. Add well beaten egg yolks and lemon juice.
Fold in the potato flour.
Place in baking pan; bake in slow oven (325\u00b0) for 45 minutes.