How Long Does Parmesan Cheese Last?
Quick Answer
Parmesan Cheese lasts 6-12 months when unopened. Once opened, it should be used within 1-2 months.
Shelf Life by Storage Condition
| Storage Condition | Duration |
|---|---|
| Pantry (Unopened) | Not applicable |
| Pantry (Opened) | Not applicable |
| Refrigerator (Unopened) | 6-12 months |
| Refrigerator (Opened) | 1-2 months |
| Freezer | 6 months |
How to Tell If It Has Gone Bad
- Visible mold growth (colors other than natural white or pale yellow)
- Off or sour smell
- Slimy or sticky texture
- Unpleasant or bitter taste
Proper Storage Tips
- Keep Parmesan cheese tightly wrapped in wax paper or parchment paper, then place in an airtight container or plastic wrap to maintain moisture balance.
- Store in the refrigerator at or below 40°F (4°C).
- For longer storage, freeze Parmesan cheese in a sealed freezer-safe bag or container.
Risks of Using Expired Parmesan Cheese
Consuming expired Parmesan cheese can lead to ingestion of harmful molds or bacteria that may cause foodborne illnesses such as gastrointestinal upset. Some molds produce mycotoxins which can be harmful if ingested in large amounts. It is important to discard cheese showing signs of spoilage to avoid health risks.
Get an Expiration Reminder
Enter your email and purchase date, and we will send you a reminder before your Parmesan Cheese expires.
Was this guide helpful?
Sources
Frequently Asked Questions
How long does Parmesan Cheese last?
Unopened Parmesan cheese lasts 6-12 months in the refrigerator, while opened Parmesan lasts about 1-2 months refrigerated.
Does Parmesan Cheese expire?
Yes, Parmesan cheese can expire and spoil, especially once opened and improperly stored.
How can you tell if Parmesan Cheese has gone bad?
You can tell Parmesan cheese has gone bad if it develops mold (other than natural white mold), an off or sour smell, a slimy texture, or an unpleasant taste.