Can One Spoiled Mushroom Spoil the Bunch? Experts Weigh In

Finding a slimy mushroom at the bottom of the pack can evoke a sense of panic when preparing dinner. Can the rest of the mushrooms still be saved, or is it time to toss the lot? To answer this culinary conundrum, we consulted food experts Bryan Quoc Le and Stephen Chavez.

According to Quoc Le, the first warning sign of spoilage is often the smell. “Certain bacteria that consume mushrooms produce ammonia, which can smell similar to cat urine,” he explains. Chavez adds that mushrooms should have an earthy aroma, never off-putting.

Visual cues are also essential; slimy or mushy textures indicate that mushrooms have gone bad. They may also dry out and become wrinkly, or develop visible mold, particularly a green mold known as Trichoderma. “Each type of mushroom deteriorates uniquely,” notes Quoc Le, pointing out that white button mushrooms may develop spots while others darken as they spoil.

Both experts agree that one bad mushroom can spoil the entire pack, especially in moist conditions, which foster bacteria and mold. However, if nearby mushrooms are free from mold and damage, they can often be salvaged. The USDA advises discarding any visibly moldy mushrooms and sanitizing surfaces they touched.

To keep mushrooms fresh longer, Quoc Le recommends not washing them until use, as moisture accelerates spoilage. Chavez suggests storing them in a paper bag in the fridge, which can extend their life up to a week for whole mushrooms, and just a few days for pre-sliced ones.

Source: www.delish.com