(Mrs. Henderson)

1 cup of butter. 1 1/4 cups of fine granulated sugar. 2 cups of flour. The grated rind and juice of half a lemon. The whites of six eggs. 1/4 teaspoonful of soda.

Beat the butter to a cream; add gradually the flour into which the soda has been sifted and beat to a smooth paste. Beat the whites of the eggs dry, using a whisk so as to make them as light as possible; whisk in the sugar (powdered sugar is designated by Mrs. Henderson, but fine granulated gives much better results), then combine the two mixtures by beating the sugar and egg very gradually into the butter and flour. Add the lemon juice last and beat until smooth. Put into an oven of very moderate heat. Bake half an hour or longer, according to the shape of the pan. Cover with an icing flavored with lemon.