Science in the Kitchen. E. E. Kellogg
is started with a sponge. The end to be attained by all is a complete and equal diffusion of gas bubbles generated during fermentation throughout the whole mass of dough.
The preferable method of combining the materials needed for the batter is by first mingling the yeast with the water or milk. If condensed or dry yeast is used, previously dissolve it well in a half cupful or less of lukewarm water. Stir the flour slowly into the liquid mixture and beat it very thoroughly so that the yeast shall be evenly distributed throughout the whole.
Proportion of Materials Needed.—The material needed for making: the bread should all be carefully measured out beforehand and the flour well sifted. Many housekeepers fail in producing good bread, because they guess at the quantity of material to be used, particularly the flour, and with the same quantity of liquid will one time use much more flour that at another, thus making the results exceedingly variable. With this same brand of flour, this same quantity should always be used to produce a given amount of bread. This amount will depend upon the quality of the material used. Good flour will absorb a larger quantity of liquids than that of an inferior quality, and the amount of liquid a given quantity of flour will take up determines the quantity of bread that can be produced from it. This amount is chiefly dependent upon the proportion of gluten contained in the flour. One hundred pounds of good flour will absorb sufficient water to produce one hundred and fifty pounds of bread. One reason why bread retains so much water is that during the baking a portion of starch is converted into gum, which holds water more strongly than starch. Again: the gluten, when wet, is not easily dried, while the dry crust which forms around the bread in baking is merely impervious to water, and, like the skin of a baking potato, prevents the moisture from escaping.
Kinds of flour vary so considerably in respect to their absorbent properties that it is not possible to state the exact proportions of flour and liquid required; approximately, three heaping measures of flour for one scant measure of liquid, including the yeast, will in general be found a good proportion. Bread made from the entire wheat will require from one half to one cupful less flour than that made of white flour. A quart of liquid, including the yeast, is sufficient for three ordinary-sized loaves. One half or two thirds of a cup of homemade yeast, according to its strength, or one half a cake of compressed yeast dissolved in a half cup of lukewarm water, will be sufficient for one quart of liquid. It is a common mistake to use too much yeast. It lessens the time required, but the result is less satisfactory. Bread to be set over night requires less yeast.
Whether water or milk should be used for bread-making, depends upon taste and convenience. Bread retains more nearly the natural flavor of the grain if made with water, and is less apt to sour; at the same time, bread made with milk is more tender than that made with water. Bread made with milk requires from one half to one cupful less of flour.
Potatoes are sometimes used in conjunction with flour for bread-making. They are by no means necessary when good flour is used, but bread made from inferior flour is improved by their use. Only potatoes that are fully matured should be used for this purpose, and they should be well cooked and smoothly mashed. Neither sugar nor salt is essential for the production of good bread, though most cook books recommend the use of one or both. The proportion of the former should not exceed one even tablespoonful to three pints of flour, and the very smallest amount of salt, never more than a half teaspoonful, and better less. No butter or other free fat is required; the tenderness of texture produced by its use can be secured as well by the use of unskimmed milk and thorough kneading.
Utensils.—For bread-making purposes, earthen or china ware is preferable to either tin or wooden utensils: being a poor conductor, it protects the sponge from the cold air much more effectually than tin, and is much more easily kept clean and sweet than wood. The utensil should be kept exclusively for the purpose of bread-making, and should never be allowed to contain any sour substance. The bowl should be thoroughly scalded before and after each using. Use silver or granite-ware spoons for stirring the bread. Iron and tin discolor the sponge. For measuring the material, particularly the liquid and the yeast, half-pint cups, divided by marks into thirds and fourths, as shown in the cut, are especially serviceable.
When to Set the Sponge.—The time to set the sponge for bread-making is a point each housekeeper must determine for herself. The fact before stated, that temperature controls the activity of fermentation, and that it is retarded or accelerated according to the conditions of warmth, enables the housewife, by keeping the bread-mixture at a temperature of about 50° F., to set her bread in the evening, if desired, and find it light and ready for further attention in the morning. In winter, the sponge will need to be prepared early in the evening and kept during the night at as even a temperature as possible. A good way to accomplish this is to cover the bowl with a clean napkin and afterwards wrap it about very closely with several folds of a woolen blanket. In extremely cold weather bottles of hot water may be placed around the bowl outside the wrappings. In case this plan is employed, care must be taken to have sufficient wrappings between the bread and the bottles to prevent undue heat, and the bottles should be covered with an additional blanket to aid in retaining the heat as long as possible.
If the sponge is set in the evening, if in very warm weather, it should be started as late as practicable, and left in a rather cool place. Cover closely to exclude the air, but do not wrap in flannel as in winter. It will be likely to need attention early in the morning.
Temperature for Bread-Making.—Except in very warm weather, the ferment or sponge should be started with liquid at a lukewarm temperature.
The liquid should never be so cold as to chill the yeast. Milk, if used, should be first sterilized by scalding, and then cooled before using.
After the sponge is prepared, the greatest care must be taken to keep it at an equable temperature. From 70° to 90° is the best range of temperature, 75° being considered the golden mean throughout the entire fermentative process of bread-making.
After fermentation has well begun, it will continue, but much more slowly if the temperature be gradually lowered to 45° or 50°. If it is necessary to hasten the rising, the temperature can be raised to 80° or 85°, but it will necessitate careful watching, as it will be liable to over-ferment, and become sour. Cold arrests the process of fermentation, while too great heat carries forward the work too rapidly. Too much stress cannot be laid upon the importance of an equable temperature. The housewife who permits the fermentation to proceed very slowly one hour, forces it rapidly by increased heat the next, and perhaps allows it to subside to a chilling temperature the third, will never be sure of good bread.
Putting the bowl containing the sponge into a dish of warm (not hot) water, or keeping it in the warming oven, or on the back of the range, are all methods which may bring about good results, provided the same degree of heat can be maintained continuously; but if the fire is one which must be increased or diminished to suit the exigencies of household details, nothing but the closest and most careful attention will keep the sponge at uniform temperature. The better way is to cover the bowl with a napkin, and in cold weather wrap closely in several thicknesses of flannel, and place on a stand behind the stove, or in some place not exposed to draughts. A bread-raiser purposely arranged for keeping the bread at proper temperature is a great convenience. Two small and rather thick earthen ware crocks of the same size, serve very well for this purpose. Scald both with hot water, and while still warm, put the sponge in one, invert the other for a cover, and leave in a warm room. All flour used in the bread should be warm when added.
Lightness of the Bread.—The time required for bread in its different stages to grow light will vary according to the quantity and strength of the yeast used and the amount of warmth supplied. A thin batter is light enough when in appearance it resembles throughout a mass of sea foam. It will not greatly increase in bulk, but will be in the state of constant activity, sending up little bubbles of gas and emitting a sharp, pungent odor like fresh yeast.