Can parmesan cheese go bad?

In this short article, we will provide an answer to the question “can parmesan cheese go bad?” and the best ways of storing it to increase the shelf life.

Can parmesan cheese go bad?

There is a straightforward answer: it degrades. If you are using a block of cheese, pre-grated or shredded cheese, the time needed for spoiling may vary depending on the kind of cheese you are using.

Do you know how long Parmesan cheese has a shelf life?

A block of Parmesan cheese that has not been opened will usually survive between 7 and 9 months in a refrigerator or cheese drawer. When making a purchase, it’s always a good idea to look for the best-by date, which will tell you how long the item may be kept in storage. What is the most pleasurable part of your job? This product should continue to be edible for many weeks beyond the expiry date!

Opened blocks of Parmesan will keep for about six months; nevertheless, it is recommended that you use it within one to two months after opening to preserve the greatest flavor quality.

It should be noted that the shelf life of grated or shredded cheese is not the same as the shelf life of a block of cheddar cheese. Make sure to double-check the best-by date, but an unopened box should usually survive up to a week after that date. Consume within 3 to 5 days after opening to ensure the best flavor quality and freshest taste. You may even store it in the refrigerator for up to seven days, although the flavor may deteriorate as a result.

What is the best way to tell whether my Parmesan Cheese is spoiled?

Visible mold growth on the surface of your Parmesan is the most apparent sign that your cheese has gone bad. It does, however, show signs of improvement! Given the hardness of Parmesan, it is easy to remove small bits of mold while still enjoying all of the delicious components.

For items with significant mold growth, it is better to take no risks and dispose of the whole item.

Grated Parmesan is a lighter shade of Parmesan than block Parmesan and is used in a variety of applications. It’s easy to tell whether anything is wrong with something just by looking at the color! If it has become yellow or dark beige, it has deteriorated and should be thrown away immediately. It’s also important to pay attention to the odor since anything that has gone bad will produce an unpleasant smell.

What is the best way to store parmesan cheese?

To prolong the shelf life of a block of Parmesan, keep it refrigerated and unopened until you’re ready to use it. The following are your choices when dealing with a block of cheese that has been opened: 

  • As an alternative, aluminum foil or cheese paper may be used to wrap the package. 
  • Approximately half of a Tupperware container should be filled with the mixture. It should be placed in a frozen bag, with as much air as possible squeezed out.
  • The trick is to keep your Parmesan from getting too much exposure to air since greater exposure to air means your Parmesan will degrade more rapidly. As a consequence, for the best results, keep your cheese in a freezer bag. If you must use Tupperware, do so only as a last resort since the extra air surrounding your cheese may decrease its efficacy when compared to other methods.
  • Packages of grated or shredded cheese that have not yet been opened should be kept in their original retail container to avoid contamination. If it was already cold when you bought it, you may want to keep it refrigerated until you use it. If it was bought from a non-refrigerated shelf, store it in a cabinet where it will remain cold, dry, and dark.
  • Once the package has been opened, place it in the refrigerator and wrap it tightly.

What will happen if you consume parmesan cheese after it has expired?

The simple truth is that consuming aged parmesan cheese is unlikely to be harmful to your health. Parmesan cheese, whether fresh or in a sprinkle canister, has a long shelf life and may be stored for months at a time.

Indeed, the bulk of parmesan is seldom rancid before it is used and may be stored for a long amount of time without becoming rancid again.

As long as the cheese is not rotting or has not gone bad, it should be OK to consume it after the expiration date has passed. It has already been stated that you should remove any moldy parts of the fresh parmesan while keeping the remaining portion of the block.


In this short article, we provided an answer to the question “can parmesan cheese go bad?” and the best ways of storing it to increase the shelf life.



Hello, I am Medhavi Singh. I am a PhD Scholar in the field of Food Science and Nutrition. I'm a skilled professional in Nutrition and Food technology. I love baking and writing food blogs, and in future, I want to become a Food Scientist.