Should Mushrooms Be Washed with Water? Experts Respond to a Long-standing Debate

Avoid Prolonged Washing: Loss of Texture and Flavor
Quick Rinse Under Running Water and Immediate Cooking Recommended

Generally, mushrooms have been known as an ingredient that should not be washed with water, but perceptions about this are beginning to change.

Although washing mushrooms with water may seem hygienic, especially when they appear to have soil on them, there has been an ongoing debate in daily life, as some argue that washing with water can spoil their flavor and texture.

According to the U.S. Department of Agriculture (USDA) food safety guidelines, it is acceptable to quickly rinse mushrooms under running water if necessary and cook them immediately afterward, but prolonged washing or soaking should be avoided. This is because mushrooms have a structure similar to a sponge, readily absorbing water.

Food scientists explain that the tissue of mushrooms is porous, allowing water not only to contact the surface but also to penetrate between the internal cells. During cooking, this excess moisture can be released, making the texture soggy in stir-fried dishes and preventing proper browning of the surface. It has also been noted that some water-soluble flavor compounds may be diluted, potentially weakening the mushroom’s characteristic umami taste.

Mushrooms are known to require minimal washing and quick preparation depending on the cooking purpose and condition. Pixabay

Well-known food scientists such as Harold McGee and prominent chefs have explained that it is safer to wipe the surface of mushrooms with a damp kitchen towel or brush rather than washing them with water.

However, American culinary expert Will Murray reported that a brief rinse with cold water does not significantly affect the amount of moisture absorbed inside mushrooms. Some experiments have shown that the amount of water absorbed during a quick rinse is much less than the moisture that evaporates during cooking.

There are also differing opinions regarding food safety. The U.S. Food Safety and Inspection Service (FSIS) generally recommends rinsing produce under running water to remove surface contamination, but in the case of mushrooms, excessive washing can lead to a decline in quality, so "minimal washing followed by immediate cooking" is emphasized.

Ultimately, the key issue appears to be not whether to wash mushrooms, but "how long they are washed" and "how quickly they are cooked" afterward. Mushrooms are not an ingredient that must be strictly kept away from water, yet they are also not a produce that should be washed as thoroughly as other vegetables. Depending on the cooking purpose and condition, minimal washing and quick preparation are essential.

Within the chef community, some strictly stick to removing only surface soil, while others use the method of quickly rinsing mushrooms under running water and removing the moisture immediately afterward.

This content was produced with the assistance of AI translation services.