If, in the making of sauces, one allowed oneself to be guided by those principles which are the very foundation of good cookery, the general denunciation of sauces by the medical faculty would be averted; and this denunciation no sauce deserves if it be carefully prepared, conformably with the laws prescribed by practice and its resulting experience.
The Roux
The roux being the cohering element of leading sauces, it is necessary to reveal its preparation and constituents before giving one’s attention to the latter.
Three kinds of roux are used—namely, brown roux, for brown sauces; pale roux, for veloutés, or cream sauces; and white roux, for white sauces and Béchamel.
[19—BROWN ROUX]
Quantities for making about One lb.—Eight oz. of clarified butter, nine oz. of best-quality flour.
Preparation.—Mix the flour and butter in a very thick stewpan, and put it on the side of the fire or in a moderate oven. Stir the mixture repeatedly so that the heat may be evenly distributed throughout the whole of its volume.
The time allowed for the cooking of brown roux cannot be precisely determined, as it depends upon the degree of heat [17] ]employed. The more intense the latter, the speedier will be the cooking, while the stirring will of necessity be more rapid. Brown roux is known to be cooked when it has acquired a fine, light brown colour, and when it exudes a scent resembling that of the hazel-nut, characteristic of baked flour.
It is very important that brown roux should not be cooked too rapidly. As a matter of fact, among the various constituent elements of flour, the starch alone acts as the cohering principle. This starch is contained in little cells, which tightly constrain it, but which are sufficiently porous to permit the percolation of liquid and fatty substances. Under the influence of moderate heat and the infiltered butter, the cells burst through the swelling of the starch, and the latter thereupon completely combines with the butter to form a mass capable of absorbing six times its own weight of liquid when cooked.
When the cooking takes place with a very high initial heat the starch gets burned within its shrivelled cells, and swelling is then possible only in those parts which have been least burned.