Expiration & Storage Tips
When does crimini mushroom expire?
Fresh crimini mushrooms generally last for 7-10 days once you bring them home from the grocery store. If unopened and kept in the original store packaging, these mushrooms can be good for up to 2 weeks. Once the package is opened or if you've purchased loose mushrooms, it's best to use them within 7-10 days. As for freezing, crimini mushrooms can be frozen for up to a year if properly cleaned, sliced and blanched before freezing.
How do you tell if crimini mushroom is bad?
The three main signs that your crimini mushrooms have gone bad are by looking, smelling and feeling. Mushrooms that are starting to go bad will develop dark spots and a slimy coating. The smell will also change and become pungent, not the typical earthy smell that fresh mushrooms have. If the mushrooms feel very soft or mushy, that's another sign they are past their prime. As soon as your mushrooms start showing any of these signs, it's best to compost them.
Tips for storing crimini mushroom to extend shelf life
• To extend the shelf life of crimini mushrooms, store them in a paper bag in the refrigerator. The paper bag helps absorb excess moisture that can speed up decay.
• Avoid washing mushrooms until you're ready to use them. They absorb water like a sponge which can hasten spoilage.
• If possible, store your mushrooms in the original packaging. They are usually packed in containers that allow for airflow.
• You can freeze crimini mushrooms, but they should be cleaned, sliced and blanched first. Place the prepared mushrooms in a freezer bag, remove as much air as possible, seal, and freeze.