Why won't my mushrooms brown?
Mushrooms go grey when they steam instead of fry. The usual culprits are a crowded pan, salt added too early, a pan that is not hot enough and stirring too often. Cook them in a hot, roomy pan in a single layer, leave them alone until they release their water and it cooks off, then salt them once they are golden.
Zestasy Wiki: our reference answers. Checked for facts and sources; less curated than the magazine.
There is a moment when mushrooms go from grey, squeaky and swimming in liquid to golden, crisp-edged and savoury. Many home cooks never see it, because they stop too soon or set things up so that it can't happen. Mushrooms are full of water, and the whole game is getting that water out of the pan.
The four culprits
A crowded pan
The biggest one. Pile a whole box of sliced mushrooms into a small pan and they release their liquid all at once. Now they are boiling in it. Spread them out in a single layer with a little space between pieces, so moisture escapes as steam. If they don't fit, cook in batches. It feels slower, but it is quicker than waiting for a puddle to evaporate.
Salt too soon
Salt draws water out. Add it at the start and the mushrooms weep into the pan before they have had a chance to colour. Salt them once they are golden, near the end.
A timid pan
Mushrooms want real heat. Get the pan properly hot, add the oil, and wait until it shimmers before the mushrooms go in. A sizzle you can hear is the sign. If they go in silently, take them out and wait.
Too much stirring
Leave them alone. Let them sit and form a golden crust on one side before you turn them. Constant stirring keeps cooling them down and stops the browning.
What you will see
- Sizzle and squeak. The mushrooms soak up the oil and the pan looks dry. Don't add more oil yet; it will come back.
- The water arrives. They shrink and release liquid. Keep the heat up and let it bubble off.
- The pan goes quiet and dry again. The released oil reappears.
- Browning. Now they colour quickly. Turn them as the undersides go golden.
- Finishing. Lower the heat, add butter, garlic, thyme or parsley, a pinch of salt, maybe a splash of wine or a squeeze of lemon. Garlic goes in now, not at the start, because it burns quickly; see why garlic burns so fast.
The pan matters too
A heavy pan holds its heat when cold mushrooms go in. Cast iron, carbon steel and stainless steel all brown beautifully. Non-stick works, but it often browns a little less. If you are choosing one, see which frying pan to buy first.
Use the widest pan you have. A big roasting tray in a very hot oven also works well for a large batch: spread them out, oil them, and roast until browned, turning once.
Wet mushrooms
A quick rinse won't ruin mushrooms, but soggy, waterlogged ones take longer to brown. Rinse just before cooking and dry them well, or brush them clean. The whole debate is on should you wash mushrooms.
Size and cut
Bigger pieces brown better than thin slices, which can turn leathery. Quarter button mushrooms, halve chestnut mushrooms and tear oyster mushrooms into strips. Torn edges crisp up beautifully.
FAQ
Should we use butter or oil?
Start with oil, which copes with heat better, and add butter at the end for flavour. Butter alone tends to burn before the mushrooms are browned.
Why are our mushrooms rubbery?
Usually because they were steamed then cooked too briefly. Let all the water cook off and give them time to brown.
Can we brown frozen mushrooms?
It is harder, because they release a lot of water. Cook from frozen in a very hot pan, let the water evaporate, then brown them in a little more oil.
Written by the Zestasy editors. General information for curious adults, not medical, nutrition or training advice.