How long can parmesan cheese be at room temperature?

Parmesan cheese should not be left at room temperature for extended periods. Here's why:

* Spoilage: Bacteria and mold can grow rapidly at room temperature, spoiling the cheese.

* Quality Degradation: Parmesan's flavor and texture deteriorate when exposed to warm temperatures for too long.

It's best to keep Parmesan cheese refrigerated at all times.

If you're only leaving it out for a short time:

* 1-2 hours: It's generally safe for a few hours, especially if it's in a cool, dry area away from direct sunlight.

* More than 2 hours: It's best to refrigerate it.

Always use your best judgment. If you're unsure about the safety of Parmesan cheese that's been out at room temperature, err on the side of caution and throw it away.