How do you know if Hard cheese (cheddar, parmesan) has gone bad?

Hard cheese (cheddar, parmesan) has likely gone bad if you notice fuzzy mould beyond the surface, slimy patches; sharp ammonia smell; slimy or oozing texture. When in doubt, throw it out.

How long does opened Hard cheese (cheddar, parmesan) last in the fridge?

Opened Hard cheese (cheddar, parmesan) lasts 3–6 weeks refrigerated.

How Long Does Hard Cheese (Cheddar, Parmesan) Last?

Q: Can you freeze Hard cheese (cheddar, parmesan)?

Yes, Hard cheese (cheddar, parmesan) can be frozen for 6–8 months.

Hard Cheese (Cheddar, Parmesan) keeps 3–6 weeks in the refrigerator after opening and 6–8 months in the freezer, according to cited USDA/FDA storage references.

2 cited USDA/FDA/FSIS sources
Editorial review · Verified June 2026

6–8 months

Safe range

Only storage locations with source-backed entries are shown; a missing freezer or pantry card means FoodLasts does not have a supported value.
Unopened and after-opening tabs are split because the source data has separate entries.

Based on USDA/FSIS guidance:

Keep eggs and refrigerated dairy at 40°F or below; sell-by dates are quality guides, not safety deadlines when storage has been cold.

Source

On a solid block of hard cheese you can cut at least 2.5 cm (1 inch) around and below a small mould spot and eat the rest; discard the whole piece if mould is widespread.

How to tell if it's gone bad

Look:Fuzzy mould beyond the surface, slimy patches
Smell:Sharp ammonia smell
Texture:Slimy or oozing texture

When in doubt, throw it out. If Hard Cheese (Cheddar, Parmesan) smells, looks, or feels off — discard it. Food poisoning is not worth the risk.

Can you freeze Hard Cheese (Cheddar, Parmesan)?

Yes.Hard Cheese (Cheddar, Parmesan)keeps 6–8 monthsin the freezer when stored in airtight packaging.

Hard cheeses such as cheddar and Parmesan freeze acceptably for cooking. Freeze them in blocks no thicker than about an inch, double-wrapped in freezer paper then a bag, for 6–8 months. Thaw in the fridge and expect a drier, more crumbly texture that won't slice cleanly — grate or melt it into sauces, bakes, and toppings rather than serving it fresh.

Full freezing guide →

How to store Hard Cheese (Cheddar, Parmesan)

Package Hard Cheese (Cheddar, Parmesan) tightly for the freezer and label the stored date. Use the freezer duration shown above for this food state.
Reseal Hard Cheese (Cheddar, Parmesan) after each use and follow any storage direction on the package.

Storage tips

Wrap hard cheese in waxed or parchment paper, then loosely in foil, so it can breathe without drying out. Store it in the warmest part of the fridge.

Is it still good?

Enter when you bought or opened it and where it's stored.

Common questions

How long does opened Hard cheese (cheddar, parmesan) last in the fridge?: Opened Hard cheese (cheddar, parmesan) lasts 3–6 weeks refrigerated.

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