USDA FoodKeeper – Cold Storage Guidelines
Official refrigerator, freezer, and pantry timelines maintained by the U.S. Department of Agriculture.
Visit USDA FoodKeeperCreamy and versatile, mozzarella can elevate everything from salads to pizzas, but keeping it fresh after opening requires a bit of attention. Stored properly in the fridge, it remains delightful for up to 14 days, with a little leeway if you're careful, but knowing when it’s time to say goodbye is crucial for safety.
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"Once opened, mozzarella should be refrigerated and used within 3 to 5 days for best quality." - USDA


Fridge
34-40°F (1-4°C)
Keep in original package or wrap tightly. Store in cheese drawer. Maintain consistent temperature.
14 days
60 days
Mold growth, unusual odor, slimy texture, discoloration
Pizza topping, melting, cooking
Provolone, mild cheese, fresh mozzarella
The expiration date on packaged mozzarella indicates the date until which the cheese is expected to remain safe for consumption. Beyond this date, there is a higher risk of spoilage and microbial growth. However, the 'best quality' or 'use by' date refers to the period during which the mozzarella is at its peak flavor and texture. While consuming mozzarella after the expiration date may not always pose an immediate health risk if stored correctly, its quality may deteriorate over time.
To determine if opened packaged mozzarella has gone bad, check for any mold growth on the surface, a sour or off smell, and a slimy or discolored texture. If you notice any of these signs, it's best to discard the mozzarella to avoid consuming spoiled food.
Opened packaged mozzarella, like other dairy products, is susceptible to contamination by harmful bacteria such as Listeria monocytogenes if not stored properly. Consuming contaminated mozzarella can lead to foodborne illnesses, especially for individuals with weakened immune systems, pregnant women, and the elderly. It is crucial to refrigerate opened mozzarella promptly and follow proper storage guidelines to prevent bacterial growth.
To maintain the freshness and quality of opened packaged mozzarella, store it in its original packaging or transfer it to an airtight container or resealable plastic bag. Keep the cheese refrigerated at a temperature of around 40°F (4°C) to slow down bacterial growth and preserve its texture. Avoid storing mozzarella near foods with strong odors, as it can absorb flavors easily. If the mozzarella develops mold or an off smell, discard it to prevent foodborne illness.
Mozzarella, a traditional Italian cheese, holds cultural significance in Italian cuisine. It is a key ingredient in popular dishes like Caprese salad, Margherita pizza, and lasagna. The term 'mozzarella' is derived from the Italian word 'mozzare,' which means 'to cut off,' referring to the way the cheese is traditionally made by hand-stretching curd and cutting it into small balls. In Italy, mozzarella di bufala, made from buffalo milk, is highly prized for its rich, creamy flavor.
Opened Packaged Mozzarella can be safely consumed within 7 days after opening. Store it in the fridge at all times and check for any signs of spoilage before eating.
Opened Packaged Mozzarella should not be left at room temperature for more than 2 hours to prevent bacterial growth. If it has been out longer, especially in warm temperatures, it's safer to discard it.
The type of container can impact Opened Packaged Mozzarella's shelf life. Opt for airtight containers to maintain freshness. Avoid storing it in containers that may absorb odors and transfer them to the cheese.
It's best to store Opened Packaged Mozzarella away from strong-smelling foods to prevent flavor transfer. Keep it in a separate section of the fridge or in sealed containers to avoid cross-contamination.
Freezing Opened Packaged Mozzarella can alter its texture, making it crumbly or slightly rubbery upon thawing. To minimize texture changes, consider shredding or slicing the cheese before freezing and use it in cooked dishes rather than for fresh consumption.
Different brands of Opened Packaged Mozzarella may have varying preservatives or packaging methods that affect shelf life. Always refer to the manufacturer's instructions on the packaging for specific storage and consumption guidelines.
Cooking Opened Packaged Mozzarella can extend its usability beyond the expiration date. However, if the cheese shows signs of spoilage even after cooking, it is safer to discard it to avoid foodborne illness.
Opened Packaged Mozzarella generally lasts longer in winter due to cooler temperatures. In summer, the heat can accelerate spoilage, so it's crucial to store the cheese properly in the fridge and consume it within the recommended time frame.
When transporting Opened Packaged Mozzarella, use a cooler bag with ice packs to maintain a cold temperature. Ensure the cheese is well wrapped to prevent exposure to varying temperatures. Once reached the destination, promptly refrigerate the cheese to maintain its freshness.
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Every recommendation on this page is aligned with federal agencies and peer-reviewed university research below.
Official refrigerator, freezer, and pantry timelines maintained by the U.S. Department of Agriculture.
Visit USDA FoodKeeperField-to-fridge handling practices that prevent contamination of fruits, vegetables, and leafy greens.
Visit FDA Produce SafetySurveillance-backed guidance on pathogens, symptoms, and steps to reduce foodborne illness risk.
Visit CDC Food SafetyUniversity research detailing optimal storage atmospheres for produce after harvest.
Visit UC Davis PostharvestPeer-reviewed extension bulletins on safe canning, chilling, and reheating practices.
Visit Penn State ExtensionNeed deeper reading? Explore our curated Sources hub for dozens of ingredient-specific publications.
Scan your food directly and get instant safety info using our AI-powered camera feature.
We have recipes that can help you safely use opened packaged mozzarella past its expiration date!
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Important: These are general guidelines based on authoritative sources listed above. Always use your best judgment and when in doubt, throw it out. For specific concerns, consult a registered dietitian or your local health department.