How long does parmesan last in the fridge?
Quick answer
- In the fridge
- Wedge, opened: 3–4 weeks · Unopened: about 6 months · Grated: up to 12 months
- In the freezer
- About 6 months
Sources: USDA FoodKeeper · Last reviewed October 1, 2026
An opened wedge of parmesan keeps 3–4 weeks in the fridge, and an unopened one about 6 months. Whole wedges in their natural rind last longest. Refrigerated grated parmesan from the store keeps up to 12 months. Mold on a wedge is mostly cosmetic; cut it away with 1cm margin. Hard rinds can be saved and added to broths for flavor. Frozen, parmesan keeps about 6 months.
How to store parmesan
Wrap parmesan in wax paper, then loose plastic, in the cheese drawer at 4–8°C. The natural rind acts as a barrier — don't trim it off before storing. For grated, keep in an airtight container. Bring to room temperature before serving for fullest flavor. Freeze whole wedges or grated portions for long-term storage; it keeps about 6 months frozen.
- Wax paper + plastic in cheese drawer
- Keep the natural rind
- Grated in airtight container
- Save rinds for broths
- Freeze whole or grated for up to a year
Signs it has gone bad
- Widespread mold beyond cuttable margin
- Ammonia or rotten smell
- Slimy patches under the rind
- Bitter or chemical taste
Frequently asked questions
How long does parmesan last?
An opened wedge lasts 3–4 weeks in the fridge; unopened, about 6 months. Refrigerated grated parmesan keeps up to 12 months.
Can you eat the parmesan rind?
Yes, though it's tough. Add to broths and soups for umami flavor instead of eating raw.
Can you freeze parmesan?
Yes — wrap tightly and it keeps about 6 months. Texture stays good for cooking and grating.