truffels

Truffles, also spelled truffels in some languages, are a group of aromatic subterranean fungi, most famously belonging to the genus Tuber in the family Tuberaceae. They form ectomycorrhizal relationships with the roots of various trees and produce edible fruiting bodies below the soil surface. The aroma and rarity of edible truffles make them highly valued in gastronomy.

The best known edible species include the black Périgord truffle (Tuber melanosporum), the white truffle (Tuber magnatum), the summer or burgundy truffle (Tuber aestivum), and the bianchetto or whitish truffle (Tuber borchii). True truffles are distinct from some other hypogeous fungi that resemble truffles but are not in the genus Tuber.

Truffles typically grow in temperate forests in Europe, Asia, and parts of North America and Australia. They form mycorrhizal partnerships with oaks, hazels, pines and other trees. Fruiting bodies are small, irregularly rounded, and may differ in size from a grape to a large potato; they develop underground and release volatile compounds that attract animals for spore dispersal, especially wild boars and trained dogs or pigs.

Harvesting usually occurs in specific seasons depending on species and climate; for example winter black truffles are found in late winter to early spring, while summer truffles appear in warmer months. Commercial production also uses inoculated tree orchards in truffle cultivation, though successful establishment requires years and precise conditions.

In cuisine, truffles are used sparingly to add aroma and flavor, typically shaved or grated over dishes, with oils and pastes that imitate their scent. Market prices are high and variable, and fraud or mislabeling can occur. They are generally safe to eat for most people, though allergy or intolerance can occur.