Demi glace, or half-glaze, is a classic French sauce that is used to garnish meat and which is also used as a base for some stocks and soups. A true demi glace is a mixture of half veal stock and half of a sauce called sauce espagnole. Sauce espagnole is made with carrots, onion, butter, celery, tomatoes and flour. Demi glace can be a complicated sauce to make, however, home cooks can find substitutes for the sauce.
Beef Bones Substitution
If you wish to tackle an authentic demi glace but are opposed to using veal bones to make the stock for ethical reasons, you can substitute beef marrow bones in the stock making part of the process. Many professional chefs are opposed to this substitution because they feel taking away veal bones removes the rich, creamy veal flavor, but you will be left with a sauce full of beef flavor.
Condensed Stock
Since a true demi glace is a time consuming, three-day process, a home cook can buy condensed stocks as a substitute. These are beef based stocks that come in a paste form. These stocks can be added to water, or even red wine, to create a passable substitute for demi glace.
Beef Gravy
Store-bought beef gravy can also be substituted for demi glace. The powdered packets that you add to water are inferior to jarred beef gravy. Jarred beef gravy will have some of the attributes of an authentic demi glace, including the right texture, thickness and color.
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Writer Bio
Suzanne Burns began writing in 1991 and currently writes for the "Source Weekly" and "Central Oregon Magazine." She has published three poetry collections and one short-story collection. After attending Central Oregon Community College, she left the degree program to become a freelance editor and writer. She has studied creative writing with Sarah Heekin Redfield, Primus St. John and Ken Kesey.