How Long Does Parmesan Cheese Last Out of Fridge?

Parmesan cheese is a delicious and versatile ingredient that can be used in a variety of dishes. Whether grated over pasta or shaved onto a salad, it adds depth and flavor to any meal. However, it’s important to know how long Parmesan cheese can last out of the fridge before it goes bad.

The Shelf Life of Parmesan Cheese

The shelf life of Parmesan cheese depends on whether it’s been opened or not. Unopened Parmesan cheese can last for up to six months at room temperature before going bad. However, once the package has been opened, the cheese will start to degrade much faster.

How Long Does Opened Parmesan Cheese Last?

If you’ve opened your Parmesan cheese and left it out of the fridge, you need to be careful about how long you keep it before using it up. Generally speaking, opened Parmesan cheese can last for about two hours at room temperature before it starts to spoil. After that point, bacteria will begin to grow on the surface of the cheese and cause it to go bad.

If you plan on keeping your opened Parmesan cheese out of the fridge for longer than two hours, you should wrap it tightly in plastic wrap or aluminum foil and put it in a cool, dark place such as a pantry or cupboard. This will help slow down the growth of bacteria and extend the shelf life of your cheese.

Storing Opened Parmesan Cheese

If you want your opened Parmesan cheese to last as long as possible, storing it in the fridge is always your best bet. When stored properly in an airtight container or resealable baggie with all air squeezed out, opened Parmesan can last for up to six months in the refrigerator without spoiling.

It’s important to note that Parmesan cheese will lose some of its flavor and texture as it ages, even when stored in the fridge. Therefore, it’s best to use it up as soon as possible for optimal taste and quality.


In conclusion, unopened Parmesan cheese can last up to six months at room temperature, while opened Parmesan cheese should be consumed within two hours if left out of the fridge. To extend the shelf life of opened Parmesan cheese, store it tightly wrapped in plastic wrap or aluminum foil in a cool, dark place or in the refrigerator for up to six months. By following these guidelines, you can enjoy delicious Parmesan cheese without worrying about spoilage or foodborne illness.