You put the mushrooms in the pan. Thirty seconds later they're swimming in a greyish liquid. Ten minutes later they're limp, pale, and they taste of nothing.
It's the easiest vegetable to ruin and one of the most spectacular when you get it right. The cause is always the same.
Why they release water
A button mushroom is about 90% water. Structurally, it's a sponge.
When you put it in a pan, that water comes out. If the pan is hot enough and big enough, it evaporates as it goes and the surface can brown. If the pan is too cool or too crowded, water pools faster than it evaporates, the base temperature collapses, and the mushrooms start to boil in their own juice.
A boiled mushroom will never brown afterwards, even if you crank the heat: it has lost its structure.
The four rules
1. Don't wash them under the tap
A mushroom absorbs tap water the way it absorbs everything else. You're adding water to something that already has too much.
Brush them, or wipe them with a damp, well-wrung cloth. If you really must rinse, do it fast and pat them dry immediately.
2. Very hot pan, wide, barely filled
This is the rule that decides. Preheat with the water drop test, high heat. And above all: a single layer, mushrooms must not touch.
For 500 g of mushrooms you want a 28 cm pan, or two batches in a 24 — which size to choose. An overcrowded pan is the number one cause of grey mushrooms, ahead of temperature.
3. Don't stir, don't salt
Two mistakes, one consequence.
Salt draws water out by osmosis. Added at the start, it empties the mushrooms before they've had time to brown. Salt right at the end, off the heat.
Stirring prevents contact. A face needs two to three still minutes against the metal to brown. Toss them every thirty seconds and no face ever browns.
4. The fat comes in two stages
A little neutral oil at the start, no more: a mushroom absorbs every bit of fat you give it, and too much at the start gives you greasy, heavy mushrooms.
The butter comes at the end, with garlic and parsley, once they're already golden. At that point they no longer absorb it, they get coated in it.
The method, step by step
- Brush the mushrooms. Cut them into quarters or thick slices — too thin and they dry out.
- Wide pan, empty, high heat, 2 to 3 minutes. Water drop test.
- A spoon of neutral oil. Tip the mushrooms in, in a single layer.
- Don't touch them for 3 minutes. They'll release water first — that's normal, and it's the moment most people panic and stir. Hold on: the water evaporates.
- When the pan is dry again and it starts sizzling properly, that's when browning begins. Stir once, give them another 2 to 3 minutes.
- Butter, crushed garlic, thyme or parsley. One minute, shaking the pan.
- Salt and pepper off the heat.
The thing to remember: there are two phases and you have to get through both. First the water comes out and evaporates. Only then does browning start. People who ruin mushrooms give up in between.
And frozen mushrooms
They hold even more water and will never truly brown. Don't defrost them first: throw them straight into a very hot pan, in small quantities, and accept the result. For a properly browned pan of mushrooms, you need fresh.
Other vegetables follow the same logic, going in by order of hardness — pan-fried vegetables.
Deglazing, again
Once the mushrooms are golden, the base of the pan is covered in brown bits. A splash of white wine, cream or stock, thirty seconds with a wooden spoon: you have a sauce, and the pan is clean — how deglazing works.
That's also why this dish works badly in a non-stick: it can't take high heat, and it doesn't hold the brown bits.
Golden mushrooms, white wine and cream: incidentally, that's the sauce for Zurich-style sliced veal.
The pan we film with is 304 stainless with no coating, in 22, 24 and 28 cm, with the 25-recipe book free.
