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Food Storage - How long can you keep...

PARMESAN CHEESE, GRATED, SOLD UNREFRIGERATED, COMMERCIALLY PACKAGED - UNOPENED

Pantry
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9-12 months
Refrigerator
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9-12 months
Freezer
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9-12 months

Tips

  • How long does unopened grated Parmesan cheese last? The precise answer to that question depends to a large extent on storage conditions - to maximize the shelf life of unopened grated Parmesan cheese, keep it in a cool, dry area.
  • How long does unopened grated Parmesan cheese last at room temperature? Unopened grated Parmesan cheese that has been sold unrefrigerated will generally stay at best quality for about 9-12 months at room temperature.
  • How long does unopened grated Parmesan cheese last in the fridge? Unopened grated Parmesan cheese will generally stay at best quality for about 9-12 months in the refrigerator.
  • To further extend the shelf life of unopened grated Parmesan cheese, freeze it: to freeze, place grated Parmesan cheese in covered airtight containers or heavy-duty freezer bags.
  • Frozen Parmesan cheese may lose some of its texture and flavor; the thawed cheese will be best suited to cooked dishes, such as sauces, soups and casseroles.
  • How long does grated Parmesan cheese last in the freezer? Properly stored, it will maintain best quality for about 12 months, but will remain safe beyond that time.
  • The freezer time shown is for best quality only - grated Parmesan cheese that has been kept constantly frozen at 0°F will keep safe indefinitely.
  • How can you tell if grated Parmesan cheese is bad or spoiled? The best way is to smell and look at the cheese: if cheese develops an off odor, flavor or appearance, it should be discarded; if mold appears, discard all of the grated Parmesan cheese.

Sources: For details about data sources used for food storage information, please click here

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