Gruyère cheese

Gruyère is a celebrated hard Swiss cheese with deep roots in the Fribourg, Vaud, Neuchâtel, Jura, and Bern cantons.

Named after the town of Gruyères, it is classified as an Alpine or Swiss-type cheese. The flavor profile is sweet yet slightly salty, though the specific taste depends heavily on the aging process. Young cheese is often described as creamy and nutty. As it matures, the flavor becomes more assertive, earthy, and complex. When fully aged between five months and one year, the texture may become slightly grainy due to small cracks.

The production of Gruyère follows a precise scientific sequence. It begins by heating raw cow's milk in a large copper vat. Makers then add liquid rennet to cause the milk to curdle. This curd is cut into pieces roughly the size of peas and stirred to release the liquid whey. The curds are cooked and then quickly raised to a specific temperature. After the whey is strained, the curds are placed into moulds to be pressed. The process continues with salting in brine and smearing the surface with bacteria.

A critical stage in making this cheese is called affinage, which is the French term for maturation. For Swiss Gruyère, this must happen in cellars that mimic the climate of a natural cave. The humidity levels must stay strictly between 94% and 98%. If the humidity is too low, the cheese will dry out. If the humidity is too high, the cheese becomes gluey and smeary instead of maturing properly. The temperature in these caves should ideally be around 15°C. Lower temperatures can result in a harder, more crumbly texture.

Historically, Gruyère often featured small holes known as eyes. In the 19th century, these holes were quite common. Scientists later discovered that these holes were caused by microscopic hay dust entering the milk during milking. Bacteria would form around these dust particles and produce gases. This gas created the characteristic holes. While these holes can prevent cracks in the cheese block, modern milking machines and techniques have reduced the amount of dust. Consequently, 21st-century Swiss Gruyère has fewer and smaller holes than in the past.

Legal protections ensure the quality and name of the cheese. In 2001, Gruyère earned the Appellation d'origine contrôlée (AOC) status. This later became the Appellation d'origine protégée (AOP) in 2013. These designations mean that production and maturation must follow strict, defined rules. While Swiss Gruyère is protected, France also produces a version known as "French Gruyère" under Protected Geographical Indication (PGI) rules. Unlike the Swiss version, French Gruyère is required to have holes ranging from the size of a pea to a cherry. In the United States, courts have ruled that "gruyere" is a generic term, though Swiss producers use the mark "Le Gruyère Switzerland AOC."

There are several distinct varieties of Gruyère based on age and origin. For example, the doux variety is at least five months old. The réserve, or surchoix, is aged for at least ten months. Other Swiss profiles include mi-salé (7–8 months) and salé (9–10 months). A very prestigious variety is Le Gruyère Premier Cru. This is produced only in the canton of Fribourg and is matured for 14 months. It has won the World Cheese Awards five times, including in 1992, 2002, 2005, 2015, and 2022.

Because of its excellent melting properties, Gruyère is a staple in many famous dishes. It is a primary ingredient in traditional Swiss fondue, often paired with Vacherin Fribourgeois and Emmental. It is also used in French onion soup and the croque-monsieur, a toasted ham and cheese sandwich. Chefs use it in quiche and chicken or veal cordon bleu because its taste is savory but not overpowering. It also serves as a fine table cheese when grated over pasta or salads. For beverages, it pairs well with white wines like Riesling, sparkling cider, or Bock beer.