Matsutake

A matsutake is a heavy, firm gilled mushroom with a white cap overlaid by flattened brown fibres, a thick shaggy ring and a solid stem patterned in the same brown below it.

It is dense in a way most woodland mushrooms are not. A matsutake in the hand feels closer to a raw potato than to a field mushroom, and that firmness survives cooking.

The smell arrives before the identification does. Experienced pickers often report smelling a patch before seeing anything, and the description that recurs across languages is spice over pine.

The Japanese name means pine mushroom, which is the plainest possible summary of where it lives and what it cannot live without. The same mushroom is songi in Korea and songrong in China, and both names point at pine as well.

It is a choice edible by any measure and it is also the one mushroom on this site whose page has to spend as much time on money as on cooking.

Smell it first, and then work through the structure.

Check the characteristic aroma alongside the other identification features.

A white mushroom with no smell does not go in the basket, whatever else about it looks right.

The rule that survives everything else

The measurements are worth carrying because a good matsutake is a substantial thing. A single top-grade specimen can weigh more than a small basket of anything else in the same wood.

Most matsutake are found before they are seen, which changes how the search works. The mushroom pushes up under the needle litter and cracks it into a small dome rather than breaking through, so pickers learn to read the ground surface rather than to scan for caps.

The ones worth the most are the ones still fully closed, with the cap gripping the stem and the veil unbroken.

That grading is commercial rather than culinary. An open matsutake tastes much the same and sells for a fraction of the price.

Japanese grading runs several tiers below that top one, and it turns on how far the cap has opened, whether the stem is straight, and whether an insect got there first.

For anybody picking rather than selling, none of it matters. A cracked, curved, half-open matsutake with a strong smell is the same dinner as a perfect one.

Everything about cooking a matsutake is about protecting the smell.

Never wash one. Water strips the aroma and the mushroom is usually clean anyway, so the standard preparation is to scrape the base with a knife and wipe the cap with a damp cloth.

Tearing beats slicing here for the same reason it does with maitake. A torn surface is rough and releases more aroma than a cut one, and the pieces hold together because the flesh is so dense.

The classic uses are deliberately restrained. Grilled with a squeeze of citrus, steamed in a light broth, or cooked with rice so the smell carries through the whole pot.

The texture is the second reason to keep the cooking short. Matsutake stays firm and slightly crunchy where other mushrooms go soft, and overcooking trades that away for nothing.

Nobody should feel obliged to like it.

The smell is strong and genuinely divisive, and plenty of people who enjoy every other wild mushroom find this one medicinal.

The matsutake has never been cultivated, and that failure is the direct cause of its price.

It fruits only from a living partnership with pine roots, and decades of research in Japan have not produced a reliable way to establish that partnership and bring it to fruiting on demand.

Work continues and has managed pieces of the problem, including growing the fungus in culture and infecting seedlings, but the step from an infected seedling to a fruiting hillside has not been solved. So every matsutake anybody has ever eaten came out of a forest floor, and the supply is whatever the forests produced that autumn.

That is why the market behaves the way it does. A good season in one country moves the price everywhere, and a bad one cannot be answered by growing more.

It is worth putting that beside the mushrooms that are farmed. Shiitake, oyster and enoki all fruit on dead wood or sawdust, which is a substrate somebody can sterilize, fill a bag with and stack on a shelf.

A matsutake needs a living pine, poor soil, an open canopy and time.

None of those fit in a bag.

Matsutake gives the ordinary profile of a firm wild mushroom, with some protein, B vitamins, potassium and fiber for very few calories. It is denser than most mushrooms of its size, so a given weight goes further on a plate than the same weight of something softer.

Nobody has ever bought one for the nutrition. This is a mushroom bought for a smell, at a price set by scarcity, and the nutritional column is beside the point.

The matsutake is mycorrhizal with pine, and the partnership is unusually demanding about the state of the forest floor.

It wants poor, well drained soil under open pine with a thin litter layer. Rich ground, deep leaf mold and a closed canopy all suppress it, which is the opposite of what most woodland mushrooms want.

That preference has a consequence people usually get backwards. This is not a mushroom of untouched forest, and the Japanese pine hillsides that produced it in quantity were kept open by people gathering firewood and raking litter for centuries.

The fungus grows outward through the soil as a dense mat and fruits in a ring at its edge, which pickers call a shiro. A productive shiro is treated as an asset and its location is not shared.

A shiro is a physical thing you can see once you know to look.

The soil inside it is bound into a pale compacted mat, other plants struggle in it, and the ring of fruiting bodies sits at the outer margin where the mat is still advancing.

It can also be old. Some shiro are believed to have been producing for decades, which is why a mapped one is worth more to a picker than any single autumn's harvest.

Picking practice reflects that. Careful pickers lift each mushroom and close the litter back over the ground rather than raking a patch open, because the mat underneath is the thing that has to survive to next year.

Matsutake appears in laboratory research on polysaccharide extracts, as most commercially important mushrooms do.

None of that supports a medicinal claim. There is no clinical evidence base here, and the mushroom's standing rests entirely on being food.

The price question has an answer and it is about forests rather than fashion.

Japanese production ran at something like 6,000 to 12,000 tonnes a year from the 1910s through the 1940s. By 2009 the recorded figure was 24 tonnes.

That is a fall of more than ninety five percent, and the species is now listed as vulnerable on the IUCN Red List.

The second cause is the one worth sitting with, because it means the forest did not become wilder in a way the fungus liked. It became shadier and richer, and this mushroom cannot live in shady rich ground.

Demand did not fall with supply, which is what produced the modern trade. Matsutake now travels to Japan from Korea, China, Canada, the United States, Mexico, Turkey and Scandinavia, and the mushrooms in those countries are closely related species rather than the same one.

The North American ones carry their own names, with Tricholoma murrillianum in the Pacific Northwest and Tricholoma magnivelare in the northeast.

For a cook the distinction rarely matters, and for a reader following a field guide it does, because the characters and the season are described from local material rather than from Japanese material.

The trade this created is unusual and worth understanding before reading any price. Mushrooms picked in Oregon or British Columbia are graded, chilled and flown to Japan within a couple of days, and the figure quoted in a news story is almost always the top grade at a Japanese auction rather than what a picker was paid.

Prices per kilo that reach the headlines therefore describe one end of a long chain. The picker's share of it moves with the season and is a small fraction of the number.