
Spoiled cheese can be hard to identify. Expiration dates are not always a reliable indicator of whether cheese is safe to eat. Instead, you should use your senses of smell, appearance, and taste to determine whether cheese has gone bad. The taste of spoiled cheese can vary, but it will often be sour or have an unpleasant aftertaste.
| Characteristics | Values |
|---|---|
| Taste | Sour, unpleasant aftertaste |
| Smell | Spoiled milk, ammonia, refrigerator or freezer |
| Appearance | Slimy surface, dark, dry, cracked areas, yellow splotches |
Explore related products
What You'll Learn
- Spoiled cheese may taste sour or have an unpleasant aftertaste
- Soft cheeses spoil faster than hard or aged cheeses
- If there's mould on soft cheese, throw the whole thing out
- Hard cheeses with mould can be salvaged by cutting off the mouldy part
- Other signs of spoilage include an off smell, discolouration, and changes in texture

Spoiled cheese may taste sour or have an unpleasant aftertaste
Firstly, it is important to use your senses to evaluate the cheese's smell, appearance, and taste. Spoiled cheese may smell like spoiled milk, ammonia, or even a refrigerator or freezer. It may also have an extra slimy surface, dark and cracked areas, or discolouration.
If you suspect your cheese may be spoiled, it is recommended to only taste a small piece to determine its flavour. If the cheese tastes sour or has an unpleasant aftertaste, it is best to discard it. This is because spoiled cheese can have an unpleasant taste or aftertaste due to the breakdown of fats and proteins, which can produce strange-tasting molecules.
It is worth noting that soft cheeses tend to spoil more quickly than hard or aged cheeses. Additionally, mold on soft cheeses usually indicates that the entire container should be discarded, while mold on hard cheeses can often be cut off without affecting the rest of the cheese.
To prolong the life of your cheese, it is recommended to store it in a breathable material like cheesecloth, parchment paper, or butcher paper, and to avoid wrapping it tightly in cellophane.
Goda Cheese: A Unique Swiss Taste Experience
You may want to see also

Soft cheeses spoil faster than hard or aged cheeses
Soft cheeses tend to spoil faster than hard or aged cheeses due to their higher moisture content, which creates an environment more prone to spoilage from bacteria. The moisture content of soft cheeses is typically between 55% and 80% of their dry weight, while hard cheeses are aged for months or years until their moisture content is significantly reduced to less than half of their weight. This lower moisture content in hard and aged cheeses makes it more difficult for bacteria to flourish, resulting in a longer shelf life.
The ideal temperature for storing cheese is between 46°F and 60°F (8°C and 15°C). However, it is important to note that cheese should be stored in the refrigerator at a temperature of below 40°F (4°C). At higher temperatures, bacteria can multiply rapidly, increasing the risk of spoilage. When storing cheese in the refrigerator, it is recommended to use porous materials like wax, parchment, or cheese paper, which allow the cheese to breathe and maintain its moisture.
The length of time cheese lasts depends on various factors, including its moisture content, storage practices, and preservatives. Soft cheeses, such as mozzarella and cream cheese, typically last one to two weeks after opening, while most hard cheeses, such as Parmesan, aged cheddar, and Gouda, can last three to four weeks after opening. Unopened blocks of hard cheese can even last up to six months in the fridge.
It is important to inspect cheese for signs of spoilage before consuming it. The three main attributes to consider when determining if a cheese has gone bad are smell, appearance, and taste. Spoiled cheese may have an unpleasant fermented smell, visible mold, drastic changes in texture, or a bitter or fizzy taste. If you suspect your cheese has spoiled, it is recommended to only taste a small piece to gauge its flavor, as consuming large amounts of spoiled cheese can be unpleasant or even harmful.
Quark Cheese: Appearance, Texture, and Color
You may want to see also

If there's mould on soft cheese, throw the whole thing out
Soft cheeses tend to spoil more quickly than hard or aged cheeses. If you spot mould on a soft cheese, it's best to throw the entire container out. This is because, unlike hard cheeses, soft cheeses are more susceptible to mould spreading throughout the entire product. While it may seem wasteful, it's simply not worth the risk to your health to consume even a small amount of mouldy soft cheese.
Hard cheeses, on the other hand, can be treated differently when mould is spotted. In most cases, it is safe to cut off the mouldy part of a hard cheese and consume the rest. This is because hard cheeses have less moisture content, which makes it more difficult for mould spores to spread. However, it's important to examine the cheese carefully and ensure that the mould has not spread throughout. If the cheese is covered in mould, it's best to discard it entirely.
Additionally, it's important to use multiple senses to determine whether a cheese has gone bad. Taste is a good indicator, as spoiled cheese will often taste sour or have an unpleasant aftertaste. Smell is another indicator, as spoiled cheese may smell like spoiled milk, ammonia, or even a refrigerator or freezer. Appearance can also be a factor, as spoiled cheese may have an extra slimy surface, dark and dry areas, or discolouration.
In summary, when it comes to soft cheeses, it's important to err on the side of caution and discard the entire product if mould is spotted. Hard cheeses can sometimes be salvaged by cutting away the mould, but only if it is caught early and has not had a chance to spread. By using your senses of taste, smell, and sight, you can help protect yourself from consuming spoiled cheese and potentially harming your health.
Pepper Jack Cheese: Pungent, Spicy, and Aromatic
You may want to see also
Explore related products

Hard cheeses with mould can be salvaged by cutting off the mouldy part
Spoiled cheese can smell and taste unpleasant. The odour can be similar to spoiled milk, ammonia, or even a refrigerator or freezer. The taste can be sour, with an unpleasant aftertaste.
When it comes to hard cheeses with mould, there are differing opinions on whether it is safe to cut off the mouldy part and salvage the rest. Some experts advise against it, while others state that it depends on certain factors.
One crucial factor is the type of cheese. Hard, dry cheeses like Parmesan, Manchego, Swiss, or Parmigiano Reggiano are less susceptible to mould because they provide an unfavourable environment for microorganisms, inhibiting their growth. Therefore, mould in these cheeses is less likely to indicate the presence of harmful bacteria or toxins. However, softer, more moist cheeses like Havarti or mild cheddar are more welcoming environments for microorganisms, so mould is more likely to indicate the presence of harmful bacteria or toxins.
Another factor to consider is the extent of the mould growth. If the mould is widespread and covers a large surface area, it is challenging to ensure that all the mould, including the underlying mycelium, has been removed. In such cases, it is recommended to discard the cheese entirely.
To safely salvage hard cheese with mould, it is generally recommended to cut off at least one inch around and below the mould spot to ensure the removal of any potential toxins. However, some people suggest that this may not be sufficient to eliminate all contamination. Therefore, it is essential to use your best judgment and consider your comfort level with the potential risks.
In summary, while it may be tempting to salvage hard cheeses with mould by cutting off the affected areas, it is important to carefully consider the type of cheese, the extent of mould growth, and your tolerance for potential risks. When in doubt, it is always advisable to discard the cheese and opt for a fresh block to ensure food safety.
The Real Taste of Feta Cheese Pasta
You may want to see also

Other signs of spoilage include an off smell, discolouration, and changes in texture
When it comes to cheese, perishability is influenced by the amount of moisture it contains. Each cheese ages and spoils differently, so determining when cheese has gone bad can be tricky. While taste is a reliable indicator of spoilage, you shouldn't have to rely on it alone. Other signs of spoilage include an off smell, discolouration, and changes in texture.
An off smell is a tell-tale sign of spoilage. As a dairy product, spoiled cheese can smell like spoiled milk, ammonia, or even a refrigerator or freezer. Some cheeses are naturally pungent and off-smelling, so it's important to familiarise yourself with the smell of your cheese when you first purchase it. This way, you'll be able to notice any deviations from its usual scent.
Discolouration is another visual cue that your cheese has gone bad. Keep an eye out for dark, dry, and cracked areas in hard cheeses, or yellow splotches on blue cheese. If your cheese has an extra slimy surface, this could also indicate spoilage. Additionally, if your unopened cheese has bloated packaging, it may have gone bad.
Changes in texture can also indicate that your cheese has spoiled. While this is more commonly associated with milk spoilage, where you might observe chunkiness or lumpiness, it can also apply to cheese. For example, fresh cheeses like cottage cheese, cream cheese, and ricotta should not have a curdling texture.
In summary, while taste can be a reliable indicator of whether your cheese has gone bad, it's important to use a combination of smell, appearance, and taste to make a final verdict. Trust your senses and remember to inspect your cheese regularly to familiarise yourself with any changes over time.
A Beginner's Guide to Head Cheese and Its Appearance
You may want to see also
Frequently asked questions
There are three main attributes to look out for when determining if your cheese has gone bad: smell, appearance, and taste. Soft cheeses tend to spoil more quickly than hard or aged cheeses, and if you spot mould on a soft cheese, you should throw it away. If you spot mould on a hard cheese, it is generally safe to cut off the mouldy part and eat the rest.
Spoiled cheese can taste sour or have an unpleasant aftertaste.
It is best to consume cheese by the date on the label or within a few days of purchasing it. You can also smell your cheese when you first purchase it so that you know what it is supposed to smell like and can notice when something is off.

























