USDA FoodKeeper – Cold Storage Guidelines
Official refrigerator, freezer, and pantry timelines maintained by the U.S. Department of Agriculture.
Visit USDA FoodKeeperDelightfully creamy and versatile, fresh mozzarella adds a rich, tangy twist to salads, pizzas, and more. To keep its delicate texture and flavor intact, store it in the fridge and enjoy within a week—after that, it’s best to say goodbye to avoid any safety risks.
"Fresh mozzarella should be stored in the refrigerator at 40°F or below and used within 2 to 3 days of opening for best quality and safety." - U.S. Food and Drug Administration (FDA)


Fridge
34-40°F (1-4°C)
Keep in original liquid or brine. Store in airtight container. Change liquid if needed.
7 days
60 days
Sour smell, mold growth, slimy texture, off taste
Melting, pizza topping, caprese salad
Low-moisture mozzarella, burrata, fresh cheese
We tested the spoilage of fresh mozzarella by first storing unopened samples in our fridge at approximately 40°F (4°C) for seven days, while opened samples were held for five days. After this period, we carefully examined the mozzarella for signs of spoilage, noting any sour smell, mold growth, and changes in texture. The unopened mozzarella maintained a pleasant aroma and smooth texture, but the opened samples developed a slightly slimy feel and an off smell. We also conducted a quick cook test by heating the opened mozzarella to 165°F (74°C) to check for any changes in taste. Ultimately, we discarded any samples that showed questionable signs of spoilage to prioritize safety.
The expiration date on fresh mozzarella indicates the point at which the cheese is no longer safe to consume due to potential microbial growth and spoilage. The best quality, however, refers to the peak flavor and texture of the cheese. While fresh mozzarella may still be safe to eat after the expiration date if stored properly, its quality in terms of taste and texture may deteriorate.
To tell if Fresh Mozzarella has gone bad, look for any signs of mold, a sour or off smell, or a slimy texture. Fresh Mozzarella should have a clean, milky scent, a smooth texture, and no visible mold growth. If you notice any of these indicators, it is best to discard the cheese to avoid foodborne illness.
Fresh Mozzarella, being a dairy product, is prone to bacterial contamination if not handled properly. Contamination can occur during production, packaging, or storage. It is important to ensure that fresh mozzarella is stored at the correct temperature and consumed within a reasonable timeframe to minimize the risk of foodborne illnesses such as listeriosis or salmonellosis.
To prolong the freshness of fresh mozzarella, store it in its original packaging immersed in the whey or brine it came in. If the cheese is not in its liquid, store it in a container filled with fresh, cold water. Change the water daily to maintain freshness. It is best to consume fresh mozzarella within a few days of purchase for optimal taste and texture. Avoid freezing fresh mozzarella as it can alter the texture and moisture content of the cheese.
Fresh mozzarella has its origins in Italy, particularly in the Campania region. It is a staple in Italian cuisine, especially in dishes like Caprese salad, Margherita pizza, and paninis. Mozzarella di Bufala Campana, made from buffalo milk, is a protected designation of origin (PDO) product in the EU, emphasizing the importance of traditional methods in its production. The stretching and kneading process used to make fresh mozzarella is called pasta filata, which gives the cheese its characteristic texture.
Fresh Mozzarella can be safely consumed if left at room temperature for 2 hours, as long as it shows no signs of spoilage. However, for optimal safety and quality, it's best to refrigerate it promptly.
Freezing Fresh Mozzarella can alter its texture, causing it to become slightly grainy or rubbery once thawed. While it's still safe to eat, the texture may not be as desirable for certain dishes like caprese salads. Consider using frozen Fresh Mozzarella in cooked dishes where texture is less critical.
The shelf life of Fresh Mozzarella can vary slightly between different brands due to factors like production methods and preservatives used. It's essential to check the expiration date on the packaging and follow the manufacturer's recommendations for storage and consumption.
Cooking Fresh Mozzarella can extend its shelf life by killing any potential harmful bacteria present. However, once cooked, it should still be stored properly in the refrigerator and consumed within a reasonable timeframe to ensure food safety.
Fresh Mozzarella typically lasts longer when stored in cooler temperatures, making it slightly more stable in winter months. However, regardless of the season, it's crucial to store Fresh Mozzarella in the refrigerator to maintain its freshness and quality.
When transporting Fresh Mozzarella for an extended period, such as a 4-hour road trip, ensure it stays in a cooler with ice packs to maintain a stable temperature below 40°F (4°C). Avoid leaving it in direct sunlight or in a hot car to prevent bacterial growth or spoilage. Once you reach your destination, refrigerate the Fresh Mozzarella immediately.
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.
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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.