Roasted chestnut mushrooms.

Chestnut mushrooms have one job on a plate: texture. In a dish of purées, braises and soft things, they are the element that has bite — and unlike almost every other mushroom, that bite survives twelve minutes at 425°F.

So keep them whole, do not overthink the seasoning, and put them where the contrast matters.

What you need

Mushrooms

• 1 lb chestnut mushrooms, clusters broken, caps whole
• 2½ tbsp olive oil
• 1 tsp flaky salt
• Black pepper

To finish (optional)

• 2 tbsp butter, garlic and thyme
• Lemon zest and parsley
• Sherry vinegar
• Grated hard cheese

Method

1. Heat the oven to 425°F with the sheet pan inside.
2. Break the clusters into individual mushrooms and trim the bases. Leave caps and stems intact and whole.
3. Toss with oil, salt and pepper. Chestnut is drier than oyster and takes oil well.
4. Spread on the hot pan in one layer, giving them space.
5. Roast 12 minutes, shaking the pan once. The caps should be glossy and darkened, the stems still firm.
6. Finish while hot — butter and garlic tossed through, or just lemon and parsley.

Do not overcook them

The whole reason to buy chestnut is the crunch, and past about fifteen minutes it starts to go. Check at twelve. A slightly underdone chestnut mushroom is much better than a soft one.

Watch for the spore dust. A tray of chestnut with fine rust-brown dust underneath is past its peak — still fine to cook, but the caps will have flattened and softened.

Where to use them

• Scattered over a purée — cauliflower, parsnip, white bean — where the contrast is the point.
• On risotto, added at the table so they stay crisp.
• Through a grain salad with herbs and lemon.
• Alongside a roast, in the same oven for the last twelve minutes.
• On soft polenta with a hard cheese grated over.

Other species that hold texture

Beech mushrooms keep a snappy stem. King trumpet stays firm but reads as dense rather than crunchy. Everything else in the species guide goes tender.

Common questions