Shelf Life Tips
- How long does an unopened package of shredded Parmesan cheese last in the fridge? The exact answer to that question depends to a large extent on storage conditions - keep shredded Parmesan cheese refrigerated at all times.
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To maximize the shelf life of shredded Parmesan cheese, do not open the package until ready to use.
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Properly stored, an unopened package of shredded Parmesan cheese will last for about 1 week after the “Sell By” or “Best By” date on the package.
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How long can shredded Parmesan cheese be left at room temperature? Bacteria grow rapidly at temperatures between 40 °F and 140 °F; shredded Parmesan cheese should be discarded if left out for more than 2 hours at room temperature.
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To further extend the shelf life of unopened shredded Parmesan cheese, freeze it; when freezing, place shredded Parmesan cheese in the freezer before the number of days shown for refrigerator storage has elapsed.
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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.
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To freeze shredded Parmesan cheese, tightly seal original packaging and place in freezer; if freezing for longer than 2 months, place package inside a heavy-duty freezer bag in order to prevent freezer burn.
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How long does shredded Parmesan cheese last in the freezer? Properly stored, shredded Parmesan cheese will maintain best quality for about 8 months, but will remain safe beyond that time.
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The freezer time shown is for best quality only - shredded Parmesan cheese that has been kept constantly frozen at 0°F will keep safe indefinitely.
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How can you tell if shredded 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 shredded Parmesan cheese.
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Sources: For details about data sources used for food storage information, please click here
