Mix a pound of sugar with twelve yolks of eggs, and a teaspoonful of essence of cinnamon; work the batter vigorously with a wooden spoon for a quarter of an hour, and then mix in the twelve whites whipped firm, four ounces of potato flour, and four ounces of best flour; fill small paper-cases with this, sugar them over, and when the sugar is melted, bake them in an oven of moderate heat, of a light colour.