37. The first step in bread making, and without doubt the most important
one, is the making of the dough. It consists in moistening the flour by
means of a liquid of some kind in order to soften the gluten and the
starch, to dissolve the sugar, and to cement all the particles together,
and then combining these ingredients. Before the ingredients are
combined, however, particularly the flour, the liquid, and the yeast,
they must generally be warmed in order to shorten the length of time
necessary for the yeast to start growing. Much care should be exercised
in heating these materials, for good results will not be obtained unless
they are brought to the proper temperature. The flour should feel warm
and the liquid, whether it be water or milk, should, when it is added,
be of such a temperature that it also will feel warm to the fingers. If
water is used, it ought to be just as pure as possible, but if milk is
preferred it should be used only after it has been scalded. The yeast
should be dissolved in a small quantity of lukewarm water. Hot water
used for this purpose is liable to kill the yeast and prevent the bread
from rising, whereas cold water will retard the growth of the yeast.