I want to make a duck confit. If stored appropriately, how long can I expect it to keep?
The French word confit means "preserved," and the process was devised as a means of preserving a variety of meats and poultry most traditionally goose, duck, or pork. It involves fully curing the meat in salt, then poaching it slowly in fat, and storing it covered with the fat until you are ready to eat it or cook with it. The technique evolved over thousands of years in cultures around the world, but, clearly, it is a dying art.
Curing the meat in salt makes the water in it unavailable to microorganisms, which renders them incapable of causing spoilage. Covering the meat with at least an inch of fat after it has been cooked keeps air from reaching it, further retarding the tendency to spoil. If the meat has been properly cured, a confit will keep in a cool, dark place (a cellar or refrigerator) for six months. You can also renew a confit after the first six months by recooking it, in which case, it will last for another four to six months. (For best, flavor, however, the confit should be consumed within three to five months of the initial cooking).
Most of the 47 people in the world who actually still make confits omit the salt-curing step, however, greatly diminishing its shelf-life. If you go this route, you can store a confit in the refrigerator for as long as a month.
Madeleine Kamman, author of The New Making of a Cook (Canada, UK), provides the following recipe for a salt-cured duck confit. Because of the curing, it is at least a two-day process. But if you want to have prime duck legs five months from now, that may be a small price to pay.
Confit of Duck
Six duck legs
Mix all the spices together and sprinkle them evenly over the legs. Measure out enough kosher salt to have 1/3 ounce for each pound of meat, and sprinkle it evenly over all sides of the legs. Set them in a flat, glass baking dish with the garlic cloves, cover with plastic wrap, and cure them in the refrigerator for 36 hours.
Preheat the oven to 275°F (135°C;). Drain all the liquid from the baking dish. Pat the legs, garlic cloves, and dish dry. Return the legs and garlic to the dish and cover with the duck fat. Bake until the garlic cloves have turned a deep golden color, which will take 2 to 2-1/2 hours. Let the meat cool in the fat until it can safely be transferred to a large canning jar. Strain the fat through a cheesecloth, and pour enough over the meat to cover it by at least an inch. Cool it completely, seal the jar, and store it in a cool, dark place such as a cellar or refrigerator for up to six months.
Frying with Goose and Duck Fat
Comparing Goose to Duck and Turkey for Fatness
Finding an Elkington Duck Press