Separate the yolk and white of an egg and beat each separately. Place a quarter of a cupful of rich milk in a bowl and add the egg yolk, a quarter of a teaspoonful each of salt and ground cinnamon, one tablespoonful of sugar, two tablespoonfuls of melted shortening and three-quarters of a cupful of flour sifted with one and a quarter teaspoonfuls of baking powder. Beat well, add the stiffly whipped egg white and enough additional flour to make a stiff dough. Roll out thin, cut in diamonds and fry in deep, hot fat. Roll while warm in powdered sugar and ground cinnamon.