How long does grated parmesan cheese last?

In this short article, we will provide an answer to the question “How long does grated parmesan cheese last?” and the information on detecting spoiled parmesan cheese.

How long does grated parmesan cheese last?

Grated Parmesan cheese that has not been refrigerated can be kept in the refrigerator for approximately 10 to 12 months after it has been opened.

Using airtight containers or heavy-duty freezer bags to store opened grated Parmesan cheese will assist to extend the shelf life of the cheese.

When making prepared items such as sauces, soups, and casseroles, it is recommended to use thawed Parmesan cheese rather than frozen because it loses part of its texture and flavor when frozen.

Product PantryFridge
Parmesan (unopened) 7 – 9 months or Use-by + 1 month
Parmesan (opened) 1 – 2 months (best quality)
Shredded/grated parmesan (sold refrigerated, unopened) Use-by + 7 days
Shredded/grated parmesan (sold refrigerated, opened) 3 – 7 days
Grated parmesan (sold unrefrigerated, unopened)Best-by + 1-month 
Grated parmesan (sold unrefrigerated, opened) 4 – 6 months

How long can you store grated Parmesan cheese in the freezer?

If properly stored, the optimum quality of grated Parmesan cheese can be maintained for up to 18 months in the freezer.

Freshly grated Parmesan cheese placed in a freezer set to 0°F will keep for an indefinite time, no matter how long it takes to defrost completely.

Is It Ever Possible for Parmesan Cheese to Go Bad?

Because hard Parmesan cheese is less likely to develop mold than soft Parmesan cheese, it can be kept for far longer periods than soft Parmesan cheese. The shelf life of cheese is determined by the age of the cheese and the method used to store it.

That the moldy section can be removed while still allowing you to use the rest of the cheese is even more advantageous. It’s important to remember that grated parmesan cheese is not the same as shredded parmesan cheese. It has a short shelf life, and removing the mold from it could be a difficult task in itself.

When your light beige cheese becomes yellow, begins to smell funny, or begins to mold, you know something is wrong with it. The wet, spongy quality of shredded cheese is a telltale sign that it is over its expiration date. If you want to avoid food poisoning, you must throw it away right away.

Identifying the Signs of Poor Quality Parmesan Cheese. Explain?


The presence of mold patches in hard cheeses such as Parmesan is generally considered to be harmless. Next, scrape the affected region and around 1 inch (2.5 cm) surrounding it with a knife to remove the imperfections. By keeping the knife away from the mold, you can prevent contamination of the rest of the piece.

Everything else is totally fine to consume, including the vegetables. The time to discard cheese has come when mold has covered the majority of the cheese’s surface. Mold-covered cheese, more often than not, contaminates a larger area than just the visible surface region. In this circumstance, throwing away the remaining cheese is the most prudent course of action to take.

Keep in mind that white and bluish-green mold are both common in the home. You should avoid red or black mold at all costs, and you should destroy any cheese that has come into touch with either.


The parmesan rind is preferred by some people, including myself since it is darker in color than the other parts of the block. This cheese should not be consumed if its color changes to a dark yellow or greyish color.

In most cases, gratified Parmesan cheese is a light beige to a pale white. The color of this piece should be considered spoiled if it turns yellow or dark beige over time.


As soon as Parmesan cheese starts to go bad, you’ll notice that it has developed a unique scent, which is an indication that it is no longer safe to consume. Odors of decomposition can range from mildewy to sour to strong, depending on the source of the odor.


Test your grated Parmesan with your fingers to see whether it is good or terrible. Otherwise, you should toss it out till it is entirely dry and spongy to the touch.

Grated Parmesan cheese may get dry over time, although this will not affect the quality of the cheese. However, melting it into the meal that you’ve prepared will enhance the flavor of the dish.


If your cheese begins to smell or taste stale or bad, don’t be afraid to chuck it out right away.


Over time, storing Parmesan in a high-humidity environment will lead it to clump together. Adding uncooked rice grains to the jar with the grated cheese can assist to keep the cheese from clumping together.

Is it dangerous to consume a piece of aged Parmesan cheese?

When it comes to your cheese, think about the range of molds that can be discovered on it. Some of them are non-toxic, while others have the potential to cause allergic reactions or respiratory troubles in susceptible individuals. If you consume cheese that has been exposed to molds that produce toxic mycotoxins, you will fall ill.


In this short article, we provided an answer to the question “How long does grated parmesan cheese last?” and the information on detecting spoiled parmesan cheese.


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