Chapter II · The Leading Warm Sauces · No. 23
23—Half Glaze
This is the Espagnole sauce, having reached the limit of perfection by final despumation. It is obtained by reducing one quart of Espagnole and one quart of first-class brown stock until its volume is reduced to nine-tenths of a quart. It is then strained into a bain-marie of convenient dimensions, and it is finished, away from the fire, with one-tenth of a quart of excellent sherry. Cover the bain-marie, or slightly butter the top to avoid the formation of a skin. This sauce is the base of all the smaller brown sauces.
Escoffier, A. (1907). A Guide to Modern Cookery, No. 23, p. 19. London: William Heinemann. Translation of Le Guide Culinaire (1903).
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