A truffle is a type of fungus that grows underground, usually near the roots of certain trees like oaks and hazelnuts. Unlike mushrooms, which grow above ground, truffles form a symbiotic relationship with tree roots, exchanging nutrients beneficial to both the fungus and the tree. They are prized as a rare, highly sought-after culinary delicacy known for their earthy aroma and rich, intense flavor. Truffles come in various types, with black truffles (Périgord truffles) and white truffles (Alba truffles) being the most famous and expensive varieties. They are harvested using trained animals such as dogs or traditionally female pigs because of their powerful scent. Culinary uses include flavoring dishes fresh or as ingredients in truffle oil, butter, and salt. Truffles are among the most expensive ingredients in the world due to their rarity and cultivation difficulty.
