Truffle black underground

Black truffle (Tuber melanosporum) is a highly prized subterranean fungus, known as the 'black diamond' of gastronomy.

About this subject

The black truffle, scientifically Tuber melanosporum, is a hypogeous fungus that grows in symbiosis with the roots of trees such as oaks, hazels, and lindens. Native to temperate regions of Europe, especially France (Perigord), Italy (Piedmont, Umbria), and Spain, it is one of the most expensive delicacies worldwide, often reaching thousands of euros per kilogram. Harvest season runs from November to March, using trained dogs (or less commonly pigs) that locate the intense, earthy aroma of ripe truffles.

Black truffle formation depends on a delicate balance of climate, soil, and host trees. Calcareous, well-drained soils with high pH are ideal. Truffles are not directly cultivated; instead, 'truffle growers' plant mycorrhized seedlings, trees already infected with fungal spores. The first harvest takes 5 to 10 years, and yields are unpredictable, contributing to their rarity and high price.

In cuisine, black truffle is used raw or lightly warmed to preserve its volatile aroma. Grated over pasta, risotto, eggs, or meat, it imparts a deep, musky, unmistakable flavor. Truffle oil, however, is usually artificially flavored, as natural oil would quickly lose the scent. Black truffle is also preserved in oil or salt and used in pâtés. The 2024-2025 season has been impacted by climate change, with droughts in Europe reducing production and driving prices even higher.

Curiously, black truffles release volatile compounds that mimic pig pheromones, explaining why pigs were traditionally used to find them. Today, dogs are preferred because they don't eat the truffle. The aroma and flavor are so complex that over 50 aromatic compounds have been identified in black truffles.

Frequently Asked Questions

What is black truffle and why is it so expensive?

Black truffle is a subterranean fungus that grows in symbiosis with tree roots. It is expensive due to its rarity, hand-harvesting with trained dogs, and global culinary demand.

Where is black truffle found?

It is native to Europe, mainly France (Perigord), Italy (Piedmont, Umbria), and Spain. It is also cultivated in other regions with suitable climate and soil.

How to use black truffle in cooking?

Use it raw or lightly warmed, grated over dishes like pasta, risotto, eggs, or meat. Avoid overcooking to preserve the aroma.