How to store fresh mushrooms, and for how long

A full basket of mushrooms always brings a little thrill and a little rush. Fresh wild mushrooms don't last long: they start to slowly spoil while you're still in the forest, and at home the clock ticks even faster. That's why experienced foragers say you should sort your haul the same evening. Let's look at how long fresh mushrooms really keep, how to put them in the fridge properly, and when you shouldn't put off processing them any longer.

Why fresh mushrooms spoil so quickly

A mushroom is almost half water and rich in protein, which makes it a perfect breeding ground for bacteria. Once picked, it keeps "breathing" and warming up from the inside, and in the heat it also breaks down quickly. Add forest debris, tiny insects and larvae in the stems, and it's clear why mushrooms shouldn't be left in a heap for long.

Especially quick to go sour are slippery jacks and honey fungus: thin-fleshed and moist, they can turn to mush within a few hours in a warm basket. Firm boletes such as porcini last a bit longer, but they're no exception either.

How long fresh mushrooms keep in the fridge

The most important rule: fresh mushrooms don't last long in the fridge. Go by these times:

• Thin-fleshed and moist (slippery jacks, honey fungus, brittlegills) — up to one day; better to process them the same day.
• Firm boletes (porcini, brown birch bolete, Xerocomus boletes) — 1–2 days.
• Chanterelles — the hardiest, they can keep for 2–3 days, because they're dense and almost never wormy.

These times are for the bottom shelf of the fridge, at around +2…+4 °C. The warmer it is, the less time you have. And remember: the fridge doesn't "restore" a mushroom, it only slows down spoilage. Cold won't save a wilted or soured mushroom.

How to put mushrooms in the fridge properly

The mistake that spoils mushrooms fastest is a sealed plastic bag. Inside it, mushrooms "suffocate" and sweat, condensation forms, and they go sour literally overnight. Do the opposite:

1. Don't wash mushrooms in advance. Moisture speeds up spoilage. Just dry-clean them of forest debris and wash them right before cooking.
2. Put them in an open, breathable container. A paper bag, a cardboard box or a bowl covered with a paper towel (not a lid) will do.
3. Spread them in a single layer. In a heap, the bottom mushrooms get crushed and stew. The more loosely they lie, the longer they'll last.
4. Keep them on the bottom shelf, the coldest one, away from cooked dishes.

How long boiled and fried mushrooms keep

If you can't process all your mushrooms at once, cooking them will buy you a few days:

• Boiled mushrooms keep in a closed container in the fridge for 3–4 days.
• Fried and stewed — about the same, up to 3–4 days.
• Cooked mushroom dishes (soup, sauce, filling) — like any other food, 1–2 days.

If that's still not enough, you can freeze boiled or fried mushrooms, and then they'll keep for months. Read more in our article how to freeze mushrooms for winter.

When to process right away instead of storing

Keeping mushrooms fresh is only a short pause. If you've brought home a big haul, the smartest move is not to keep it in the fridge until the last minute, but to put it to use right away:

• **Dry** — best for porcini, brown birch boletes and Xerocomus boletes; it concentrates the aroma and keeps mushrooms for years.
• **Freeze** — the easiest way to keep mushrooms close to fresh.
• **Pickle** — for slippery jacks, honey fungus and boletes.

The forager's golden rule is simple: picked today — sorted today. That way no mushroom goes to waste, and your winter pantry fills up with the best the forest has to offer.

Sources

• "Vyznachnyk hrybiv Ukrainy" (Identification Guide to the Mushrooms of Ukraine; Kyiv, Naukova Dumka publishing house).
• Mushroom on Wikipedia, the section on storage and nutritional value.
• Guidelines on safe food storage at +2…+4 °C.