How Long Does Grated or Shredded Parmesan Last in the Fridge?
Written by Jordan Morley · Storage times from the USDA FoodKeeper database · Last updated 28 October 2026
Grated or Shredded Parmesan keeps for 12 months in a fridge running at 0–5°C.
Storage tips for grated or shredded parmesan
- Fridge at 0–5°C. A fridge thermometer is the cheapest food-safety upgrade — many home fridges run warmer than their dial suggests.
You can also check the calorie content of grated or shredded parmesan alongside its safety information. Want to know exactly what's in your food? Our ingredient checker covers E-numbers, allergens and vegan status.
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Store it properly
Fridge thermometer
These storage times assume 0–5°C — check what your fridge actually runs at.
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More storage essentials
Vacuum food sealer
Removes the air that speeds spoilage — extends shelf life by days.
Check Price →Airtight glass containers
Fridge, freezer and microwave safe — one less transfer step.
Check Price →Grated or Shredded Parmesan next to similar foods
| Food | Fridge time |
|---|---|
| Processed Cheese Slices | 3–4 weeks |
| Grated Cheddar or Mozzarella | 1 month |
| Cheddar (Opened) | 6 months |
| Parmesan (Opened) | 6 months |
| Grated or Shredded Parmesan | 12 months |
Of the 10 cheese foods with a fridge time in this guide, grated or Shredded Parmesan keeps for longer than 9.
Common questions
How long does grated or shredded parmesan last in the fridge?
12 months in a fridge running at 0–5°C (USDA FoodKeeper guidance). After that, quality and safety both start to slip, and because the bacteria that cause food poisoning are invisible, ‘it seems fine’ is not a reliable test. When in doubt, throw it out.
How can I tell if grated or shredded parmesan has gone off?
On hard cheese, a small patch of mould can be cut away with at least 2.5 cm (1 inch) of margin; on soft, crumbled, grated or sliced cheese, any mould means bin it. Do not rely on this alone: the time guideline matters even when everything looks fine.
Can I freeze grated or shredded parmesan to keep it longer?
Freezing is not recommended for this food; the texture tends to suffer badly. Buy or cook only what you will use in time.
Does my fridge temperature really matter?
Yes. These times assume a fridge at 0–5°C, which is what the Food Standards Agency says to set it to. Bacteria grow faster in a warmer fridge, and many fridges run warmer than their dial suggests, so a cheap fridge thermometer is worth having.
Related answers
Primary source: USDA FoodKeeper.
General information only, not medical advice: see the medical disclaimer. Feeling unwell after eating something? Contact NHS 111 or your GP.