CARBOHYDRATE, A FOODSTUFF.—Because sugar, starch, and cellulose have somewhat the same composition and some properties in common, they are grouped into one class, viz. carbohydrate. Sugar, starch, and cellulose are all included in the term carbohydrate. Carbohydrate is one of the foodstuffs. Sugar is a food containing only the carbohydrate foodstuff. Cereals contain not only carbohydrates but other foodstuffs. They contain, however, a larger quantity of carbohydrate than any of the other foodstuffs, for which reason they are classed as carbohydrate-rich foods.
CEREALS.—Cereals are cultivated grasses, the seeds of which are used for food. The most important are wheat, Indian corn or maize, rice, oats, rye, and barley. From these many different kinds of flours, meals, and breakfast foods are prepared.
Cereals rank high in nutritive value. Many of them contain about 75 per cent of starch. They also contain ash and a substance which builds the body. Because they are widely distributed in various climates, they have an important place in man's diet.
At market one finds two classes of cereals sold as breakfast foods—(1) the ready to eat and (2) the uncooked or partially cooked grains. The ready-to-eat cereals cost much more per pound than the cereals that require cooking. The difference in the price per pound, however, is not an accurate difference in the cost of the two, for the cost of the fuel in cooking grains at home must be taken into consideration.
Of the cereals that require cooking, those that are partially cooked are doubtless the more popular. Many of these such as rolled oats or wheat are steamed and rolled. Hence they take much less time to prepare in the home kitchen than the uncooked grains.
All breakfast cereals require long cooking to make them most palatable, the time of cooking depending upon the character of the cellulose and the method of preparing the cereal for market.
Most partially cooked grains are improved by a longer cooking than is usually given them. It is interesting to measure equal quantities of a rolled cereal and cook one quantity for 20 minutes and the other for 1 1/2 hours and taste each. The superior flavor and texture of the well-cooked cereal is well worth the additional length of time of cocking. Grains are also found on sale in bulk and in package. The latter cost more but insure greater cleanliness. Since, however, cereals sold in bulk are those that require cooking, they will be thoroughly sterilized before serving and need occasion no concern regarding their cleanliness.
GENERAL RULES FOR COOKING CEREALS.—Pour the cereal slowly into boiling salted water. Cook directly over the flame for about 10 minutes. Then place over boiling water and cook from 1/2 to 8 hours. Usually one teaspoonful of salt is used for each cupful of cereal. The quantity of water depends upon the kind of cereal. The double boiler is particularly good for cooking cereals. The fireless cooker also is a most satisfactory device for cooking these foods easily and economically.
Starchy foods are most easily digested when well masticated. Dry foods require more mastication than moist foods. It is well then to have the water used in cooking the cereal entirely absorbed. If, when nearly done, the cereal is too moist, uncover the vessel and cook until the excess of water is evaporated.
Care should be taken, however, not to allow a tough skin to form on the top of the cereal. This digests with difficulty. Its formation can be prevented by keeping the cereal covered or by stirring occasionally.