Aspic is a dish in which ingredients are set into a gelatin made from a meat stock or consommé. Similar dishes, made with commercial gelatin mixes instead of stock or consommé, are usually called gelatin salads.
When cooled, stock made from meat congeals because of the natural gelatin found in the meat. The stock can be clarified with egg whites, and then filled and flavored just before the aspic sets. Almost any type of food can be set into aspics. Most common are meat pieces, fruits, or vegetables. Aspics are usually served on cold plates so that the gel will not melt before being eaten. A meat jelly that includes cream is called a chaud-froid.
Nearly any type of meat can be used to make the gelatin: pork, beef, veal, chicken, turkey, or fish. Gelatin is also found in cartilage. The aspic may need additional gelatin in order to set properly. Veal stock provides a great deal of gelatin; in making stock, veal is often included with other meat for that reason. Fish consommés usually have too little natural gelatin, so the fish stock may be double-cooked or supplemented. Since fish gelatin melts at a lower temperature than gelatins of other meats, fish aspic is more delicate and melts more readily in the mouth.
Historically, meat jellies were made before fruit and vegetable jellies. By the Middle Ages at the latest, cooks had discovered that a thickened meat broth could be made into a jelly. A detailed recipe for aspic is found in Le Viandier, written in around 1375.
Aspic is rather an ingredient than a dish. Aspic, made from clarified stock and gelatin, is used for many things; it can be used as a binder to hold other ingredients together in terrines, or sealers in such foods as pate en croute.
Today, aspic is often used to glaze show pieces in food competitions to make the food glisten, making it more appealing to the eye, but its original use was to prolong the shelf life of food. Since the aspic was used to glaze the entire item, it cut off the oxygen supply to the food, preventing bacteria within from multiplying.
In Poland (known as “galareta”), in Ukraine (known as “studinets”), Latvia (similarly known as “galerts”), in Russia (known as “kholodets”), in Serbia (known as “pihtije”), and in Romania (known as “piftie” or “rǎcituri”) aspic often takes the form of pork jelly, and it is popular around the Christmas and Easter Holidays. In Asia, among the Newars of Kathmandu Valley, Nepal, buffalo meat jelly is a major component of the winter festivity gourmet. It is eaten in combination with fish aspic, which is made from dried fish and buffalo meat stock, soured, and contains a heavy mix of spices and condiments.