Sponge Cake - cooking recipe

Ingredients

2 eggs, separated
1 c. sugar
1 c. self-rising flour
1/3 c. hot water
2 tsp. vanilla (optional)

Preparation

Beat egg yolk until a lemon color.
Beat egg whites.
Add egg yolk, sugar and flour.
Add hot water and 1 teaspoon vanilla. Add stiffly beaten egg whites last. Bake in a well-greased pan in 350\u00b0 oven.