Frederic Melton
The shelf life of shredded cheese depends on various factors, including the type of cheese, its moisture content, and how it is stored. Soft cheeses like mozzarella and cheddar have a shorter shelf life, lasting only one to two weeks in the fridge, even when unopened. On the other hand, hard cheeses like Parmesan and Swiss have a lower moisture content and higher salt content, enabling them to stay fresh for up to a month when unopened. Proper storage techniques, such as wrapping the cheese in breathable paper and sealing it in an airtight container, can also extend the cheese's longevity.
| Characteristics | Values |
|---|---|
| Shelf life of unopened shredded cheese in the fridge | 6 months |
| Shelf life of opened shredded cheese in the fridge | Hard cheese: 3-4 weeks, Soft cheese: 1-2 weeks |
| Indication of spoiled cheese | Off odors, discolouring, or spots of mold |
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What You'll Learn
Hard cheeses last longer
Hard cheeses like Parmesan, Swiss, and blocks of cheddar will last longer than soft cheeses. Unopened, they can last up to six months in the fridge, according to the USDA. This is because they have a lower moisture content and higher salt content than soft cheeses, which aids in their preservation. Once opened, hard cheeses will last at least three to four weeks in the refrigerator, provided they are stored properly. This involves wrapping them in wax paper, parchment paper, or cheese paper, then storing them in an airtight container.
On the other hand, soft cheeses like mozzarella, ricotta, and tubs of cream cheese have a higher moisture content, making it easier for mold and bacteria to spread. Once opened, they will typically last around one to two weeks in the fridge. It's important to note that any cheese with red or black mold should be discarded, and if there is an "off" smell, it's best to trust your senses and not consume the cheese.
Shredded cheese, specifically, can be made from a variety of cheeses, including cheddar, mozzarella, and blends. The shelf life of shredded cheese depends on the type of cheese and storage methods. For example, shredded Parmesan and similar hard cheeses can be kept at room temperature for a few days, similar to how they are stored in grocery stores. Freezing shredded cheese can also extend its shelf life, with one source recommending consumption within six months.
In summary, hard cheeses like Parmesan and cheddar will generally last longer than soft cheeses, both in terms of unopened and opened storage. Proper storage techniques, such as wrapping and airtight containers, can further extend the shelf life of hard cheeses. Additionally, factors like moisture content and salt content play a role in the longevity of different types of cheese.
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Soft cheeses are more perishable
While shredded cheese can be stored in the fridge, it will not last forever. The duration of its freshness depends on the type of cheese. Hard cheeses like Parmesan and Swiss should be consumed within a month of purchase, whereas soft cheeses like cheddar and mozzarella will only last one to two weeks. If you're freezing shredded cheese, it's recommended to eat it within six months. However, always use your best judgement and avoid consuming the cheese if you notice any unpleasant odours, discolouration, or mould.
Now, let's delve into why soft cheeses are more perishable. Soft cheeses, also known as fresh cheeses, are delicate and creamy. They are made from fresh curds that haven't undergone pressing or ageing processes. This lack of ageing contributes to their shorter shelf life. Soft cheeses encompass a range of textures, from grainy varieties like cottage cheese to smoother, spreadable options like cream cheese. Mozzarella, burrata, and feta are also considered soft cheeses.
The high moisture content in soft cheeses is the primary reason for their increased perishability. This moisture provides an ideal environment for bacterial growth, causing the cheese to spoil more rapidly than harder cheeses with lower moisture levels. It's crucial to adhere to proper food safety guidelines when handling soft cheeses, as the US Department of Health advises against keeping perishable foods, including soft cheeses, unrefrigerated for more than two hours.
In contrast, harder cheeses tend to have a longer shelf life due to their lower moisture content, which inhibits bacterial growth. Examples of hard cheeses include cheddar, Parmesan, and Gouda. These varieties can be left unrefrigerated for up to four hours, according to the Dairy Farmers of Wisconsin. However, it's important to monitor them for signs of spoilage, such as an unpleasant smell, a slimy surface, dark spots, dryness, cracked areas, or mould.
To maximise the shelf life of soft cheeses, it is recommended to purchase smaller amounts more frequently. Proper storage is also essential to prevent spoilage. Soft cheeses should be kept refrigerated and well-wrapped to maintain their quality and freshness. By following these guidelines, you can ensure that your soft cheeses remain safe and enjoyable for consumption.
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Proper storage techniques
Unopened shredded cheese
Unopened shredded cheese should be stored in the refrigerator, in its original packaging. The packaging is designed to prevent the cheese shreds from drying out.
Opened shredded cheese
Once opened, the type of shredded cheese will determine how long it lasts. Hard cheeses like Parmesan and Swiss should be eaten within a month of opening. Soft cheeses like cheddar and mozzarella will only be good for one to two weeks after opening.
When storing opened shredded cheese, it is important to use an airtight container to prevent the cheese from drying out and to protect it from the drying fans in the refrigerator. One source recommends using food storage containers, while another suggests that wrapping the cheese in wax or cheese paper, and then in plastic wrap, is the best method.
No matter how well you store your cheese, it's important to use your best judgment before eating it. If you notice any unpleasant odours, discolouring, or spots of mould, it's best to throw the cheese away.
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Signs of spoilage
The shelf life of unopened shredded cheese depends on the type of cheese. Hard cheeses like Parmesan and Swiss will last longer (up to six months if unopened, per the USDA) due to their lower moisture content and higher salt content, combined with an intense aging period. On the other hand, soft cheeses like mozzarella and cheddar have a shorter shelf life, even when unopened, due to their higher moisture content, which makes it easier for mold and bacteria to spread.
Regardless of whether it is hard or soft cheese, once shredded cheese is opened, it will only last a few weeks in the refrigerator. Proper storage techniques are essential to prolonging the shelf life of shredded cheese. It is recommended to wrap hard cheeses in wax paper, parchment paper, or cheese paper and then store them in an airtight container.
- Off odors: If the cheese has developed an unpleasant or unusual smell, it is likely spoiled. The "off" smell will vary between different types of cheeses, so it is important to familiarize yourself with the smell of fresh cheese to detect any deviations. For example, mozzarella should not smell yeasty, while a funky blue cheese like Roquefort should not have a sour or ammonia-like odor.
- Discoloration: If the cheese has changed color or developed spots, it is likely spoiled. Any sign of mold, especially red or black mold, indicates that the cheese is no longer safe to eat and should be discarded.
- Texture changes: Texture changes, such as clumping or grit, can indicate spoilage. Fresh cheese should have a consistent texture, and any changes in texture, such as clumping or a sticky surface, may indicate the presence of bacteria or mold.
- Date of purchase: While proper storage can prolong the shelf life of shredded cheese, it is important to consider the date of purchase. Hard cheeses like Parmesan should be consumed within a month of purchase, while soft cheeses like cheddar and mozzarella are best eaten within one to two weeks.
- Taste: Although taste is subjective, it can be an indication of spoilage. If the cheese tastes unpleasant or has an unusual flavor, it is likely spoiled.
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Freezing shredded cheese
Shredded cheese can be frozen, whether it's pre-shredded or shredded at home. It's best to freeze shredded cheese in an airtight, resealable plastic freezer bag, removing as much air as possible. The cheese can be frozen for up to two to six months, although it can still be used after this period if it shows no signs of spoiling.
When it comes to defrosting, it's best to use the cheese within a couple of hours of defrosting, although it can be left at room temperature for about 20 minutes. It's also possible to use shredded cheese straight from the freezer, without defrosting, by breaking off or shaking out the desired amount.
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Frequently asked questions
Unopened, hard cheeses like Parmesan or blocks of cheddar will last six months in the fridge. Once opened, hard cheeses will last at least three to four weeks in the refrigerator, provided they are stored properly.
Once opened, soft cheese will last around a week and hard cheese will last 3–4 weeks in the fridge. If you notice any off odors, discolouring, or spots of mould on your shredded cheese, don't eat it!
The high moisture content of soft cheeses makes it easy for mould and bacteria to spread beneath the surface. Always throw out any cheese with red or black mould. Your senses are one of the best indications of the quality of the cheese. Noting the smell of a fresh cheese will help you set a baseline for the next time you give it a cursory sniff.
Yes, shredded cheese has a higher surface area than block cheese, which makes it more susceptible to bacteria and mould.
