COCOA SPONGE CAKE

3 eggs,
1−1/2 cups of sugar,
1/2 a cup of cold water,
1 teaspoonful of vanilla,
1−3/4 cups of flour,
1/4 a cup of Baker''s Cocoa,
2 teaspoonfuls of baking powder,
1 teaspoonful of cinnamon.
Beat yolks of eggs light, add water, vanilla and sugar; beat again
thoroughly; then add the flour, with which the baking powder, cocoa and
cinnamon have been sifted. Fold in the stiffly beaten whites of the eggs.
Bake in a rather quick oven for twenty−five or thirty minutes.