Thinking about your leftover mozzarella and wondering, “How Long Does Mozzarella Cheese Last In The Fridge?” It’s a super common question, especially when you’re just starting to cook or want to make sure your food is safe to eat. Sometimes, the packaging isn’t clear, or you’ve opened it and aren’t sure how long it’s good for. Don’t worry!
Figuring this out is simpler than you might think. We’ll walk through it step-by-step so you can enjoy your cheese with confidence.
Keeping Mozzarella Fresh In The Refrigerator
Mozzarella cheese is a favorite for pizzas, salads, and many other dishes. But like all fresh foods, it has a shelf life. Knowing how long mozzarella lasts in the fridge helps you reduce waste and avoid foodborne illnesses.
Several things affect how long your mozzarella will stay good, from the type of mozzarella to how it’s stored.
Understanding Different Types Of Mozzarella
Not all mozzarella is created equal. The form it comes in plays a big role in how long it will last. Fresh mozzarella and low-moisture mozzarella have different storage needs and shelf lives.
Fresh Mozzarella
Fresh mozzarella, like the kind packed in water or brine, is soft and creamy. It has a high moisture content. Because of this, it spoils much faster than its drier counterpart.
When you buy fresh mozzarella, it usually comes in a sealed container with whey or brine. This liquid helps keep it moist and fresh. Once you open the package, its lifespan in the fridge significantly shortens.
It’s best to use it within a few days after opening.
Signs of spoilage in fresh mozzarella include a sour smell, a slimy texture, or visible mold. If you notice any of these, it’s time to toss it.
Low-Moisture Mozzarella
Low-moisture mozzarella is the type you typically find shredded, in blocks, or in logs. It has a firmer texture and less water. This makes it last much longer than fresh mozzarella.
Shredded low-moisture mozzarella might come pre-shredded in a bag. Blocks and logs are usually sold unwrapped or in vacuum-sealed packaging.
This type is more stable and can sit in your refrigerator for a good while, both before and after opening. Its longer shelf life makes it a popular choice for everyday cooking.
Factors Affecting Mozzarella’s Shelf Life
Several factors influence how long your mozzarella cheese will remain fresh and safe to consume in the refrigerator. Paying attention to these details can help you get the most out of your cheese.
Storage Conditions
The temperature of your refrigerator is key. It should be set at 40°F (4°C) or below. Colder temperatures slow down bacterial growth, which is essential for preserving cheese.
Proper wrapping is also crucial. For blocks or logs of low-moisture mozzarella, re-wrap them tightly in plastic wrap or place them in an airtight container. This prevents the cheese from drying out and absorbing other odors from the fridge.
Fresh mozzarella, as mentioned, needs to stay in its brine or whey. If the original liquid is gone, you can try submerging it in fresh milk or lightly salted water, but this is a temporary fix.
Packaging
The original packaging plays a role. Unopened packages of low-moisture mozzarella, especially vacuum-sealed ones, will last the longest. Once opened, exposure to air begins the spoilage process.
Pre-shredded mozzarella often contains anti-caking agents. While these help keep the shreds from sticking, they can sometimes affect the texture and flavor over time. Pre-shredded cheese can also spoil faster once opened because more surface area is exposed to air.
Handling and Contamination
Cleanliness is vital. Always use clean utensils and hands when handling cheese. Cross-contamination from other foods can introduce bacteria that shorten its lifespan.
For example, if you use a knife that previously cut raw meat to cut cheese, you risk transferring harmful bacteria. Ensure all kitchen tools and surfaces are clean before preparing or serving cheese.
How Long Does Mozzarella Cheese Last In The Fridge The Answer
Now, let’s get to the core question. How Long Does Mozzarella Cheese Last In The Fridge? The answer varies depending on the type of mozzarella and whether it’s been opened.
Unopened Low-Moisture Mozzarella
Unopened blocks, logs, or balls of low-moisture mozzarella can last quite a long time. Check the “best by” or “sell by” date on the package. Typically, they can be good for:
- Blocks and logs: 3 to 6 weeks past the sell-by date if stored properly in the refrigerator.
- Shredded low-moisture: 1 to 2 weeks past the sell-by date.
It’s important to remember that “best by” dates are about quality, not safety. If stored correctly, the cheese might still be safe to eat beyond this date, but its flavor and texture might decline.
Opened Low-Moisture Mozzarella
Once opened, the clock starts ticking faster for any type of mozzarella.
- Opened blocks or logs: You should aim to use these within 1 to 2 weeks.
- Opened shredded low-moisture: This tends to have a shorter life once opened, usually about 5 to 7 days.
Always re-wrap opened cheese tightly to minimize air exposure. If you notice any changes in smell, appearance, or texture, it’s best to discard it.
Unopened Fresh Mozzarella
Fresh mozzarella, especially the kind packed in liquid, has a much shorter shelf life. Unopened packages are usually good until the date printed on them. This is often quite soon after purchase.
- Typically, unopened fresh mozzarella should be consumed within 1 to 2 weeks of the production date, and often much sooner after you buy it.
Opened Fresh Mozzarella
This is where freshness is most critical. Once you open a package of fresh mozzarella:
- It’s best to use it within 2 to 3 days.
- Keep it submerged in its original brine or whey in an airtight container.
If you’ve used some and the brine is gone, try to
Identifying Spoilage Signs
Knowing how to spot a bad mozzarella is as important as knowing how long it lasts. Your senses are your best guide here.
Visual Cues
Look for any signs of mold. Mold can appear as fuzzy green, blue, black, or pink spots. On hard cheeses like low-moisture mozzarella, you can sometimes cut off the moldy part if it’s a small spot, but for fresh mozzarella, any mold means it’s spoiled.
Also, check for unusual discoloration or a change in texture. Fresh mozzarella might become unusually hard or rubbery, or develop a slimy coating. Low-moisture cheese might become overly dry and crumbly, or sticky.
Smell Test
Cheese should have a pleasant, milky aroma. If your mozzarella smells sour, ammonia-like, or just generally “off,” it’s a strong indicator that it has gone bad.
Fresh mozzarella should smell mild and slightly tangy. A strong, pungent smell is a warning sign.
Taste Test (Use Caution)
If the visual and smell tests seem okay, you can try a very small taste. However, if there were any doubts from the previous tests, it’s safest to skip this step and discard the cheese.
A spoiled cheese will taste unpleasantly sour, bitter, or just wrong. If it tastes bad, don’t eat any more of it.
Storing Mozzarella Properly
Proper storage is the secret to extending the life of your mozzarella. Here are the best ways to keep it fresh.
For Low-Moisture Mozzarella
Blocks and logs: After opening, re-wrap the cheese tightly in plastic wrap. You can also place it inside an airtight container for extra protection. This prevents it from drying out and absorbing fridge odors.
Shredded: Keep the original bag tightly sealed, or transfer the shreds to an airtight container. Try to press out as much air as possible before sealing.
Remember to store it in the coldest part of your refrigerator, usually the back of a lower shelf.
For Fresh Mozzarella
Keep it in its original brine or whey. If the liquid has evaporated or you’ve used it all, you can store it in a container filled with:
- Fresh milk
- Lightly salted water (about 1 teaspoon of salt per cup of water)
Make sure the cheese is fully submerged. Use an airtight container. Fresh mozzarella is best eaten the day you open it, so plan to use it quickly.
Can You Freeze Mozzarella
Freezing is an option for low-moisture mozzarella, but it will change its texture. Fresh mozzarella is generally not recommended for freezing because its delicate structure will be ruined.
Freezing Low-Moisture Mozzarella
If you have a lot of low-moisture mozzarella (block or shredded) that you won’t use before it expires, you can freeze it.
- For blocks: It’s best to shred or slice it before freezing. This makes it easier to use later.
- For shredded cheese: You can freeze it directly from the bag.
Place the cheese in an airtight freezer bag or container. Remove as much air as possible to prevent freezer burn. Frozen low-moisture mozzarella can last for about 6 months.
When you thaw it, it might be more crumbly or watery than before. It will still melt well, making it perfect for cooked dishes like casseroles, sauces, or baked pasta, but it might not be ideal for fresh preparations where its texture is key.
Thawing Frozen Mozzarella
Thaw frozen mozzarella in the refrigerator overnight. Avoid thawing it at room temperature, as this can encourage bacterial growth.
Can You Re-freeze Mozzarella
It’s generally not recommended to re-freeze mozzarella, especially after it’s been thawed. Freezing and thawing can degrade the cheese’s quality and texture each time.
When In Doubt Throw It Out
Food safety is paramount. If you are ever unsure about the freshness or safety of your mozzarella cheese, it is always best to err on the side of caution and discard it. This applies to all types of cheese and food products.
Frequently Asked Questions
Question: How long does unopened mozzarella cheese last in the fridge
Answer: Unopened low-moisture mozzarella can last 3-6 weeks past the sell-by date for blocks and logs, and 1-2 weeks for shredded. Unopened fresh mozzarella should be used by its printed date, usually within 1-2 weeks of production.
Question: Can I eat mozzarella that has a little mold
Answer: For low-moisture mozzarella, if the mold is a small spot and the cheese is firm, you can often cut off at least an inch around and below the mold and eat the rest. For fresh mozzarella, any mold means it has spoiled and should be discarded.
Question: What happens if I eat old mozzarella
Answer: Eating old mozzarella can lead to food poisoning. Symptoms can include nausea, vomiting, diarrhea, and stomach cramps. It’s best to avoid the risk by consuming cheese before it spoils.
Question: Does mozzarella cheese need to be refrigerated after opening
Answer: Yes, absolutely. All types of mozzarella cheese, both fresh and low-moisture, must be refrigerated after opening to slow down bacterial growth and maintain freshness.
Question: How do I store fresh mozzarella after opening
Answer: Keep fresh mozzarella submerged in its original brine or whey in an airtight container. If the liquid is gone, you can store it in fresh milk or lightly salted water, but use it within 2-3 days.
Final Thoughts
Keeping your mozzarella fresh is simple with a little care. For low-moisture types, proper re-wrapping and refrigeration are key, giving you weeks of use. Fresh mozzarella is more delicate, best enjoyed within days of opening, and kept in its liquid.
Always trust your senses—look, smell, and if necessary, taste cautiously—to determine if your cheese is still good.