Overview — Cheese is a food made by coagulating milk into curds and separating whey. Traditionally a preserved form of dairy, cheese ranges from fresh soft varieties to long-aged hard ones. As a basic food category it is commonly referred to as a dairy product derived from animal milk, most often from milk produced by cows, goats or sheep.

Common types

Many familiar varieties illustrate cheese diversity: for example cheddar, Swiss (and other Alpine styles) and provolone. Other broad categories include fresh unripened cheeses, soft-ripened surface-mold cheeses, washed-rind styles, blue-veined cheeses and firm hard cheeses.

How cheese is made

Basic production has a few consistent steps. Milk is standardized for fat and sometimes pasteurized; heat and acid or starter cultures begin curd formation, and an enzyme (traditionally rennet) helps coagulate proteins. Curds are cut and stirred to release whey, then drained, salted and shaped. Many cheeses are then aged under controlled temperature and humidity to develop texture and flavor. Pasteurization and starter cultures are important variables; see pasteurization and the role of bacteria in ripening.

Characteristics and what affects them

Appearance, texture and taste reflect multiple influences. Key factors include:

  • Form and size determined by molding and pressing;
  • Texture, from creamy to crumbly, shaped by moisture and aging;
  • Colour, which can be natural or modified by additives or feed;
  • Flavour, produced by milk composition, cultures, maturation and salt;
  • Type of milk—cow, goat, sheep—and its fat and protein content;
  • Processing choices such as salting, pressing and rind treatment.

History, uses and notable facts

Cheese has a long human history as a way to concentrate and preserve milk; regional traditions led to the wide variety available today. It is used in everyday cooking and fine dining alike: melted in sauces, sliced on sandwiches, grated over dishes, or paired with wine and fruit. Storage depends on type—fresh cheeses are refrigerated and eaten quickly, while many aged cheeses can be kept longer and sometimes improve with controlled maturation.

Understanding these elements helps with selection and storage, and explains why the same basic ingredient—milk—yields such a broad culinary spectrum. For further reading, consult general guides to cheese production and style classifications via resources like dairy references and specialty cheese guides (milk origins, variety lists, regional profiles, tasting notes, manufacturing steps, texture descriptions, colour factors, flavor chemistry, animal milk types, pasteurization issues, microbial ripening).