The Boston cooking-school cook book

at the fire, and replenish by sprinkling on a small quantity of coal if there is not sufficient heat to effect the baking. =To Mix Sponge Cake.= Separate yolks from whites of eggs. Beat yolks until thick and lemon-colored, using an egg-beater; add sugar gradually, and continue beating; then add flavoring. Beat whites until stiff and dry,—when they will fly from the beater,—and add to the first mixture. Mix and sift flour with salt, and cut and fold in at the last. If mixture is beaten after the addition of flour, much of the work already done of enclosing a large amount of air will be undone by breaking air bubbles. These rules apply to a mixture where baking powder is not employed. =To Mix Butter Cakes.= An earthen bowl should always be used for mixing cake, and a wooden cake-spoon with slits lightens the labor. Measure dry ingredients, and mix and sift baking powder and spices, if used, with flour. Count out number of eggs required, breaking each separately that there may be no loss should a stale egg chance to be found in the number, separating yolks from whites if rule so specifies. Measure butter, then liquid. Having everything in readiness, the mixing may be quickly accomplished. If butter is very hard, by allowing it to stand a short time in a warm room it is measured and creamed much easier. If time cannot be allowed for this to be done, warm bowl by pouring in some hot water, letting stand one minute, then emptying and wiping dry. Avoid overheating bowl, as butter will become oily rather than creamy. Put butter in bowl, and cream by working with a wooden spoon until soft and of a creamy consistency; then add sugar gradually, and continue beating. Add yolks of eggs or whole eggs beaten until light, liquid, and flour mixed and sifted with baking powder; or liquid and flour may be added alternately. When yolks and whites of eggs are beaten separately, whites are usually added at the last, as is the case when whites of eggs alone are