Buttermilk

Definition and stakes

Johan Ditlev Frederiksen The Story of Milk

Cooling Essential.—If buttermilk is left to stand for hours in a warm room, fermentation goes on and may soon spoil the buttermilk by making it sloppy or bitter. It should therefore be cooled at once when drawn from the churn; if kept in ice water it may remain in fine flavor for several days. Well taken care of it is not only a pleasing and refreshing drink but eminently healthful. In cooking, too, it can be used to advantage.
Commercial Buttermilk or Cultured Milk is simply carefully soured milk. It can be made at home from fresh milk either whole or skimmed or partly skimmed.
Source: Gutenberg

Various Book of American Baking

To use buttermilk in bread-making the milk must be fresh—not more than twenty-four hours old. Old milk will not do, and when fermentation is started the dough must be attended to and baked in a good oven. Of course, I am not going to advise a novice to use buttermilk, or he would most probably be doomed to failure, but I have indicated the possibilities of the use of buttermilk. I will give you an analysis of buttermilk and also of new milk. New milk contains 4.0 per cent of fat, 3.6 of proteids, 4.5 milk sugar, 9.7 of ash or mineral matter, 87.2 per cent.
Source: Gutenberg

T. D. Curtis Hints on Dairying

A too rapid or sudden separation of the butter from the buttermilk is not desirable. It is no recommend for a churn that it churns quick. Such a churn is apt to injure the so-called grain of the butter and make it salvy and greasy. The least churning that will separate the butter from the buttermilk is the best.
Source: Gutenberg

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