For most common mushrooms—white button, cremini, and portobello—you’ve got about five to seven days in the fridge. That’s the sweet spot. Think of it like a weekend guest: they’re delightful for a few days, but after a week, things start getting awkward.
If you buy them from a farmers’ market or a store with high turnover, they might be even fresher and last a day or two longer. But those pre-packaged plastic-wrapped ones from the supermarket? They’re usually already a few days old when you bring them home.
I once bought a gorgeous bag of shiitakes for a soup, got invited to a last-minute dinner out, and completely forgot about them. Day five? They were fine. Day seven? I gave them a sniff test and a gentle squeeze—still good. Day nine? They were waving a tiny white flag.
The Sniff Test Is Your Best Friend
Your nose knows what’s up. Fresh mushrooms smell like earth and dirt—in a good way, like after a spring rain. If they start smelling sour, like old socks or dirty gym shorts, that’s your cue to say goodbye.
Also, look for wet spots that are dark and mushy, or a slimy film. A little bit of dryness is fine—that’s just the mushroom being a little thirsty. But sliminess is a no-go. Think of it like a handshake: firm and dry is great; sticky and slippery means you’re in trouble.
How Long Can You Keep Fresh Mushrooms In Refrigerator | Detroit Chinatown
My friend Sarah once kept a bag of creminis for two weeks because she was convinced the “best by” date meant the day they turned into pumpkins. After some gentle coaching, she finally admitted they smelled like a damp basement. They went straight to compost (which is, honestly, a noble end for a mushroom).
