Mushrooms: How to Check for Bugs
Mushrooms: Button
Button mushrooms are not infested under normal circumstances. They may be used after a thorough washing.
Mushrooms: Oyster
Frequently Infested. Cannot be checked.

Mushrooms: Portobello
Sometimes Infested. Must be checked.
How to clean Portobello mushrooms
1. Separate stem from cap.
2. Check stem.
3. Check cap by scooping out fan-like underpart.
4. Wash thoroughly.
No inspection is necessary.
Mushrooms: Shitake
October-May
May be used after a thorough washing
June-September
During the summer months, shitake mushrooms can have small flies hiding in the white fan of the mushroom. Firmly run your fingers through the white fan and observe if any flies come out. If flies are noticed, discard that mushroom. This process is a quick process and is strongly recommended.

Mushrooms: Canned
Not infested under normal circumstances. Need not be checked