How do you get people to wash their vegetables when you're at their house and you don't wanna seem rude?
So awkward, but come on it says right there on the package to wash those mushrooms or whatever it is… You’re not their mom but you don’t wanna eat feces or whatever ended up on the produce. A quick rinse is never going to be perfect but it’s better than nothing.
In the absence of legitimate suggestions, commiseration is welcome too 😉
As far as I've found, they're both right. You shouldn't have to wash your mushrooms, but it's not a bad idea if you're not buying fancy mushrooms.
The generic button mushroom variants you're probably getting at the grocery store are grown in compost, which often contains some manure - ie poops.
But before growing mushrooms it's pasteurized. Mycelium is picky, and fairly easily out-competed by other stuff, so to make sure you're just growing mushrooms and not bacteria you basically have to sterilize the medium they're grown in.
But those mushrooms are often grown in open beds, and harvested by hand. And that means they get that poop dirt right up on them. Will it immediately give you super botulism? Probably not but it's still kinda ick.
Fancier mushroom varieties from smaller cultivars are the ones that actually don't really need washed and often shouldn't be. They're grown in highly sterile environments and they fruit out of a container, so they never touched the poop. And that's if they even used compost - lots use straw or wood.
If you do decide to wash your button mushrooms it's not a big deal, they aren't actually sponges, and they don't absorb as much water as some cooking shows say. If they get soggy it probably means they're old, try putting them in the fridge for a few hours uncovered. It's basically a dehydrator.
I sweat the mushrooms in the microwave before I sauté. They release a ton of water, which I use on another dish's preparation (rice, pasta, kale, etc).
Running mushrooms under water makes them soggy, that's just reality. You can get them just as clean wiping them with a slightly damp paper towel or cloth without that happening.
First off, it's true: mushrooms do absorb water when you wash them, but it's only about 2% of their total weight, or, translated to volume, that's about 1 1/2 teaspoons of water per pound, which in turn translates to an extra 15 to 30 seconds of cooking time.
Been washing all kinds of mushrooms for years and I‘ve had the opposite experience. They’re only soggy if they’ve been cooking in oil, soaked it up, then dumped all their water. They don’t get brown as they soak up the oil, and then they dump it all out with the water, meaning you’re just steaming them until you evaporate off all the water.
Best is to wash the mushrooms, slice, cook in a little bit of water until they dump out their water, cook until the water has evaporated, then add oil and brown (or even crisp if you desire).
Perfect mushrooms every time (I’ve dated a lot of vegans so I’ve eaten mushrooms every few days for over a decade).
Wash them whole and dry them right after. Contrary to popular belief, they don’t soak up water like sponges with a quick wash. You can easily prove this by just weighing them before and after washing/drying. The weight change is minuscule.
Total water absorption doesn't matter that much because the significant thing is surface texture. If you're going to dry them anyway you might as well instead wash them without directly pouring water on them.
A friend of mine solves this by meticulously peeling the caps and discarding the stems. It seems like a lot of work to me. I use a mushroom brush to get the dirt and substrate/manure off and call it good.
Just a note that raw mushrooms make people sick all the time and are a very common cause of food poisoning - especially wild mushrooms. You can get away with it with super common crimini mushrooms but some people are allergic even to that.