SAEDNEWS: Proper storage helps slow moisture buildup and spoilage, keeping fresh mushrooms firm, dry, and fresh for longer.
According to SAEDNEWS, fresh mushrooms can darken quickly when exposed to excess moisture, poor airflow, or prolonged storage. Although slight browning does not always mean mushrooms are spoiled, good storage practices can help maintain their appearance, texture, and quality.
Moisture is one of the main factors that can accelerate deterioration. Avoid washing fresh mushrooms before storing them unless you plan to use them immediately. If they are damp, gently pat them dry with a clean paper towel.
For better storage, place the mushrooms in a paper bag or wrap them loosely in paper towels. Paper allows some airflow while absorbing excess moisture. A tightly sealed plastic bag can trap condensation and make mushrooms deteriorate faster.
Fresh mushrooms should generally be refrigerated rather than left at room temperature for extended periods. Keep them in a part of the refrigerator where they can remain cool without being exposed to unnecessary moisture.
A practical storage routine is:
Check the mushrooms and remove any that are already visibly spoiled.
Do not wash them before refrigeration.
Place them in a paper bag or a breathable container lined with paper towel.
Store them in the refrigerator and avoid crushing them under heavy foods.
Use them relatively soon rather than keeping them for an unnecessarily long period.

Not every dark spot means the mushrooms need to be discarded immediately. Natural discoloration or minor bruising can occur as mushrooms age. However, mushrooms that have become slimy, excessively soft, moldy, or noticeably unpleasant in smell should not be used.
Keeping mushrooms dry and allowing some ventilation is therefore more useful than trying to prevent every small color change. Proper storage mainly slows quality loss rather than stopping the natural aging process completely.