They seem wrinkled
Fresh mushrooms are plump and juicy, with smooth skin. The same cannot be true for fungi that have been sitting in your fridge for an extended period of time. In fact, wrinkled skin is a telltale indicator that mushrooms have begun to lose moisture and are thus past their prime
They have a slimy, damp feel about them.
There are many different kinds of mushrooms, and none of them are intended to be slimy. Indeed, mushrooms with a slick layer practically beg to be thrown in the compost bin or trash can. Bottom line: Avoid fungi that don’t feel dry to the touch since they’re almost probably rotting.
They’ve darkened in hue.
Discoloration of any type is a significant warning signal when it comes to mushrooms. Mushrooms with dark splotches or that have turned a consistently darker tone than before should be discarded. However, it’s worth mentioning that unwashed mushrooms frequently contain dirt on their surface, so keep that in mind while appraising the issue.
They have a peculiar odor.
Mushrooms with a strong or sour odor are (unsurprisingly) unsafe to consume. Yes, aged mushrooms, like many other expired foods, may get rancid—and the scent, my friends, always know. As a result, it’s wise to give your shrooms a whiff before putting them in the pan. Mushrooms that are generally fragrance-free, with the exception of slight earth and dirt odor, are safe to consume; anything more fragrant is a strong sign of rotting.
What is the shelf life of mushrooms?
The good news is that mushrooms have a rather long shelf life when properly preserved. Fresh, whole mushrooms may be stored in the fridge for one to two weeks, while sliced mushrooms should be cooked and used within four to seven days. However, the longevity of shop-bought mushrooms is actually dependent on the state they were in when you got them (which you should examine right immediately), as well as how you keep them when you get home.
How to properly store mushrooms?
Your reaction is to chuck the plastic-wrapped container in the fridge and call it a day—which is OK if mushrooms are on the menu in the coming days. People who wish to extend the life of their mushrooms, on the other hand, should be aware that traditional retail packaging is not the way to go, because plastic wrap retains moisture and accelerates deterioration. As a result, the Mushroom Council suggests storing fresh, entire mushrooms in an open or perforated brown paper bag to promote air circulation and prevent the growth of mold and slimy things. Once you’ve transferred your mushrooms to a paper bag, simply place them in the fridge’s main compartment (not the crisper drawer) and you’re ready to go.