Demi-glace warm. At this point, the espagnole is prepared, and when it is finished, the brown stock is added in equal portions to the espagnole. Demi-glace keeps very well, about six months refrigerated or almost indefinitely frozen. Due to the considerable effort involved in making the traditional demi-glace, chefs commonly substitute a simple "jus lié" of veal stock or to create a simulated version, which the American cookbook author Julia Child referred to as a "semi-demi-glace"(i.e. sans espagnole sauce). However, even today, many chefs who prepare French "haute cuisine" use a demi-glace prepared in their own kitchen. Concentrates and mixes, mostly
French cuisine these sea mammals were eaten. Artificial freshwater ponds (often called "stews") held carp, pike, tench, bream, eel, and other fish. Poultry was kept in special yards, with pigeon and squab being reserved for the elite. Game was highly prized, but very rare, and included venison, wild boar, hare, rabbit, and birds. Kitchen gardens provided herbs, including some, such as tansy, rue, pennyroyal, and hyssop, which are rarely used today. Spices were treasured and very expensive at that time – they included pepper, cinnamon, cloves, nutmeg, and mace. Some spices used then, but no longer today in French cuisine are cubebs,