Here are the ingredients you will need:
Granulated sugar, nine ounces,
Flour, four ounces,
Potato meal, two ounces,
Taste of lemon peel.
Follow these simple steps:
Stir for at least half an hour the yolks of the eggs with the sugar and a tablespoonful only of the flour and meal, using a ladle. Beat the whites of the eggs until they are quite firm, mix slowly with the first mixture and when they are well incorporated pour over from a sieve the flour and the potato meal, previously dried in the sun or on the fire.
Bake in a tin where the mixture comes about one inch and a half thick, previously greasing the tin with cold butter and sprinkle with powdered sugar mixed with flour.
In these cakes with beaten whites the following method can also be followed: mix and stir first the yolks with the sugar, then put the flour then, after a good kneading, beat the whites until they are firm, pour two tablespoonfuls to soften the mixture, then the rest little by little.