Can You Eat Cheese That Is Out of Date?
It depends on the type of cheese, how it was stored, and the appearance and smell. While hard cheeses are often safe to eat past their date if properly stored and show no signs of spoilage, soft cheeses pose a higher risk and should generally be discarded after their expiration date.
Understanding Cheese Dating
The dates stamped on cheese packaging are often ‘best by’ or ‘sell by’ dates, not necessarily ‘use by’ or expiration dates. This distinction is crucial because ‘best by’ indicates peak quality, not necessarily safety. ‘Sell by’ dates are primarily for retailers. Understanding this nuance is the first step in making an informed decision about consuming cheese past its labeled date.
Factors Affecting Cheese Safety
Several factors contribute to whether cheese remains safe to eat after its expiration date. These include:
- Type of Cheese: Hard cheeses, like Parmesan and cheddar, have lower moisture content, making them less hospitable to bacteria. Soft cheeses, such as Brie and ricotta, have higher moisture content, creating a breeding ground for harmful pathogens.
- Storage Conditions: Proper refrigeration is essential. Cheese should be stored at temperatures below 40°F (4.4°C). Consistent refrigeration prevents rapid bacterial growth.
- Packaging Integrity: Vacuum-sealed packaging helps inhibit bacterial growth. Once opened, cheese is more susceptible to spoilage.
- Presence of Mold: While some cheeses, like blue cheese, naturally contain mold, the presence of mold on other cheeses can indicate spoilage. Different types of mold pose different risks.
Identifying Spoiled Cheese: Signs to Watch For
Before consuming cheese past its date, carefully inspect it for signs of spoilage:
- Visual Inspection: Look for changes in color, texture, and the presence of unfamiliar mold. Discoloration or a slimy texture are red flags.
- Smell Test: An ammonia-like or overly pungent odor is a strong indicator of spoilage. Good cheese should have a pleasant or characteristic aroma.
- Taste Test (With Caution): If the cheese passes the visual and smell tests, taste a small amount. A sour, bitter, or off-putting flavor suggests spoilage. Do not swallow if the taste is suspect.
General Guidelines by Cheese Type
Here’s a breakdown of how long different types of cheese typically last past their expiration date, assuming proper storage:
| Cheese Type | Shelf Life Past Expiration Date (Properly Stored) | Considerations |
|---|---|---|
| Hard Cheeses | 2-4 weeks | Hard cheeses can often be trimmed of mold and consumed. |
| Semi-Hard Cheeses | 2-3 weeks | Examples include Gouda and Monterey Jack. Watch for excessive mold growth. |
| Soft Cheeses | 1 week or less | Soft cheeses are the most perishable. Discard immediately if any signs of spoilage are present. |
| Processed Cheeses | 1-2 weeks | Due to additives and processing, they may last longer but are not necessarily safer to eat. Prioritize quality and avoid any visible spoilage. |
| Blue Cheeses | 2-3 weeks | Only discard if new, uncharacteristic mold growth is present. The intended mold is part of the cheese. |
What to Do If You Suspect Spoiled Cheese
If you suspect that cheese is spoiled, it’s best to err on the side of caution:
- Discard it immediately. Do not attempt to salvage it.
- Clean and sanitize any surfaces that came into contact with the cheese.
- Monitor for any symptoms of food poisoning, such as nausea, vomiting, or diarrhea. If symptoms develop, seek medical attention.
Benefits of Proper Cheese Storage
Storing cheese correctly not only prolongs its shelf life but also preserves its flavor and texture. Proper storage involves:
- Wrapping Cheese Tightly: Use cheese paper, wax paper, or plastic wrap to prevent drying and mold growth.
- Storing Cheese in the Refrigerator’s Crisper Drawer: This area provides consistent temperature and humidity.
- Avoiding Cross-Contamination: Store cheese away from raw meats and other foods to prevent cross-contamination.
Common Mistakes in Cheese Storage
Many people inadvertently shorten the lifespan of their cheese due to common storage mistakes:
- Storing Cheese in the Door of the Refrigerator: The temperature fluctuates more in the door, accelerating spoilage.
- Not Wrapping Cheese Properly: Allowing cheese to dry out makes it susceptible to mold.
- Storing All Cheeses Together: Different cheeses have different storage requirements.
The Role of Salt in Cheese Preservation
Salt acts as a natural preservative in cheese by drawing out moisture and inhibiting bacterial growth. Cheeses with higher salt content, like feta, tend to have a longer shelf life.
The Impact of Manufacturing Processes
The manufacturing processes used to create cheese, such as pasteurization and aging, can affect its shelf life. Pasteurized cheeses generally last longer than unpasteurized cheeses due to the elimination of harmful bacteria during the pasteurization process. Aged cheeses, like aged cheddar, develop a protective rind that helps inhibit spoilage.
Frequently Asked Questions (FAQs)
Can I eat cheese if it has mold on it?
It depends on the type of cheese. Hard cheeses like cheddar can usually be salvaged by cutting away at least one inch around the moldy area. Soft cheeses like Brie and cottage cheese should be discarded immediately if mold is present, as the mold can penetrate deeper and potentially produce harmful toxins.
What does ‘sell by’ mean on cheese packaging?
A “sell by” date indicates the date by which a store should sell the cheese to ensure optimal quality. It does not mean that the cheese is unsafe to eat after that date. Properly stored, most cheeses will remain edible for some time beyond the “sell by” date.
How long does unopened cheese last in the fridge?
Unopened hard and semi-hard cheeses can last for several weeks past their expiration date in the refrigerator, assuming proper storage. Soft cheeses have a shorter shelf life, typically lasting only about a week. Always check for signs of spoilage before consuming.
Is it safe to eat cheese if it smells a little strong?
Some cheeses naturally have a strong aroma. However, if the cheese develops an unusually pungent or ammonia-like odor, it is likely spoiled and should be discarded. Trust your nose!
Can I freeze cheese to make it last longer?
Yes, you can freeze cheese, but it can affect its texture. Hard cheeses freeze better than soft cheeses. When thawing, it’s best to thaw cheese in the refrigerator for several hours to minimize changes in texture.
What are the signs of food poisoning from eating bad cheese?
Symptoms of food poisoning from bad cheese can include nausea, vomiting, diarrhea, stomach cramps, and fever. If you experience any of these symptoms after eating cheese, consult a doctor immediately. Prevention is key: always inspect and smell the cheese before consuming.
Is it okay to eat cheese with a slimy texture?
No, cheese with a slimy texture is a clear sign of spoilage and should be discarded. The sliminess indicates the presence of bacteria that can cause food poisoning.
How should I store cheese after opening it?
After opening cheese, re-wrap it tightly in plastic wrap, cheese paper, or wax paper. Store it in the refrigerator’s crisper drawer to maintain consistent temperature and humidity.
What is the best way to tell if a soft cheese like ricotta is spoiled?
The best way to tell if soft cheese like ricotta is spoiled is by checking for a sour smell, slimy texture, or the presence of mold. If any of these signs are present, discard the cheese immediately.
Does vacuum-sealed cheese last longer than cheese that’s not vacuum-sealed?
Yes, vacuum-sealed cheese typically lasts longer because the packaging removes oxygen, which inhibits bacterial growth. However, once opened, the cheese should be stored properly as described above.
Is it better to buy cheese in bulk or smaller portions?
It depends on your consumption habits. If you eat cheese frequently, buying in bulk can be more economical. However, if you only eat cheese occasionally, it’s better to buy smaller portions to prevent waste and spoilage.
Can I eat cheese if the package is puffed up?
No, a puffed-up package indicates the presence of gas-producing bacteria, which is a sign of spoilage. Discard the cheese immediately.