Once cooked or opened mozzarella sticks have sat out at room temperature for more than 2 hours, they should be thrown away, because bacteria multiply quickly between 40°F and 140°F.
In the refrigerator, place the mozzarella sticks on a shelf where the temperature is consistent, ideally between 35°F and 40°F.
Check Temperature: Ensure your refrigerator is set to the correct temperature, ideally below 40°F (4°C).
Mozzarella sticks last 5 to 7 days in the refrigerator and about 2 to 3 months in the freezer for best quality, as long as they are sealed in an airtight container and kept at or below 40°F (4°C).
Mozzarella sticks last 5 to 7 days in the refrigerator and about 2 to 3 months in the freezer for best quality, as long as they are sealed in an airtight container and kept at or below 40°F (4°C). Once cooked or opened mozzarella sticks have sat out at room temperature for more than 2 hours, they should be thrown away, because bacteria multiply quickly between 40°F and 140°F. Below you'll find exact fridge and freezer times, how to freeze, thaw and reheat them, the temperatures that keep them safe, and the clearest signs that mozzarella sticks have gone bad. For a reliable place to keep them cold, compare our refrigerators.
Storing Mozzarella Sticks
Proper Storage of Mozzarella Sticks
When storing mozzarella sticks, it's crucial to keep them in an airtight container or tightly sealed bag to prevent exposure to air and moisture. This helps to maintain their texture and flavor. If you have freshly made mozzarella sticks, allow them to cool to room temperature before storing them in the refrigerator or freezer.
In the refrigerator, place the mozzarella sticks on a shelf where the temperature is consistent, ideally between 35°F and 40°F. This helps to keep them fresh for a longer period. For longer storage, consider freezing the mozzarella sticks. Ensure they are well-wrapped to avoid freezer burn.
See the freezing, thawing and reheating sections below for step-by-step freezer guidance.
Factors Affecting Shelf Life
Several factors can impact how long mozzarella sticks stay fresh in your fridge:
Temperature: Maintaining a consistent refrigerator temperature between 35°F and 40°F is crucial for prolonging the shelf life of mozzarella sticks.
Packaging: Using airtight containers or tightly sealed bags minimizes exposure to air and moisture, preserving the sticks' quality.
Freshness at Purchase: The initial freshness of the mozzarella sticks when you buy them plays a significant role in their longevity.
Handling: Proper handling practices, such as avoiding cross-contamination with other foods, are essential for maintaining the quality of mozzarella sticks.
Storing mozzarella sticks in the refrigerator keeps them fresh for a short period. Cooked or opened mozzarella sticks typically last about 5 to 7 days in the fridge. The same window applies to leftover or takeout mozzarella sticks (for example, restaurant or Pizza Hut cheese sticks) once they have been cooked. Store them in an airtight container so they don't absorb other odors and flavors.
Freezing is the most effective way to extend the shelf life of mozzarella sticks. For the best quality, eat frozen mozzarella sticks within 2 to 3 months, when their breading and cheese are at their peak. Kept constantly at 0°F (-18°C), they stay safe to eat for much longer — up to about 8 months — but the coating can turn soggy and the cheese can dry out the longer they sit. Wrap them tightly in aluminum foil or seal them in a freezer-safe bag before freezing to avoid freezer burn.
Cheese sticks freeze very well, and a two-step "flash freeze" keeps them from clumping into one solid block. To freeze mozzarella sticks the right way:
Pre-freeze: Place the mozzarella sticks on a baking sheet lined with parchment paper, making sure they are not touching each other. Pre-freeze for 1 to 2 hours until firm.
Transfer to a freezer bag: Once pre-frozen, move the mozzarella sticks into a freezer-safe bag or airtight container. Flash-freezing first stops them from sticking together, so you can grab just a few at a time.
Label and date: Write the freezing date on the bag so you can track their shelf life.
Seal properly: Press out excess air and seal tightly to prevent freezer burn.
Step
Action
1
Pre-freeze on a parchment-lined baking sheet
2
Transfer to a freezer bag or airtight container
3
Label and date the bag
4
Seal properly to keep out air
Freezer burn happens when frozen food is exposed to air, causing dehydration and oxidation. On mozzarella sticks it shows up as dry, white or grayish patches, and the affected areas may turn tougher or more brittle. Tightly wrapped, airtight packaging and a steady 0°F (-18°C) freezer are the best defense. Temperature swings that partially thaw and refreeze the sticks also degrade their texture, so avoid overcrowding the freezer and let air circulate.
Thawing mozzarella sticks properly protects their texture and keeps them safe to eat. Choose one of these methods:
Refrigerator thawing: Move the frozen sticks to the fridge for several hours or overnight. This gradual thaw best preserves quality.
Microwave thawing: Use the defrost setting and watch closely so the sticks don't start to cook.
Cold water thawing: Submerge the sticks in a sealed plastic bag in cold water, changing the water every 30 minutes until thawed.
Thawing Method
Time Required
Refrigerator
6 - 8 hours
Microwave (defrost)
2 - 3 minutes
Cold Water
1 - 2 hours
You can also cook most breaded mozzarella sticks straight from frozen without thawing first — just follow the reheating times below.
Best Practices for Reheating
Reheating mozzarella sticks correctly keeps the exterior crisp and the inside gooey. Whichever method you use, heat them until the center reaches 165°F (74°C) to ensure they are safe to eat.
Oven: Preheat to 375°F (190°C), place the sticks on a parchment-lined baking sheet, and bake for 8 to 10 minutes until heated through and crispy.
Air fryer: Preheat to 370°F (188°C), arrange the sticks in a single layer, and heat for 5 to 7 minutes until crisp.
Microwave: Heat on a microwave-safe plate for 1 to 2 minutes, turning halfway through. This is the fastest option but produces a less crispy exterior.
Identifying whether your mozzarella sticks have gone bad is crucial for ensuring food safety. Here are key indicators to look out for:
Smell: Spoiled mozzarella sticks often emit a sour or off odor. Fresh mozzarella sticks should have a mild, dairy-like scent.
Appearance: Visible mold or discoloration is a clear sign of spoilage. Fresh mozzarella sticks should be uniformly white or lightly golden (if breaded).
Texture: If the texture becomes slimy or excessively hard, the mozzarella sticks are likely no longer safe to eat.
Taste: A sour or unusual taste is a definite indicator that the mozzarella sticks have spoiled.
Use the following table to quickly reference these signs:
Indicator
Fresh Mozzarella Sticks
Spoiled Mozzarella Sticks
Smell
Mild, dairy-like
Sour, off
Appearance
Uniformly white/lightly golden
Mold, discoloration
Texture
Firm, consistent
Slimy, excessively hard
Taste
Mild, cheesy
Sour, unusual
Safety Precautions
To avoid foodborne illnesses, it's essential to follow safety precautions when handling mozzarella sticks:
Storage: Store mozzarella sticks in an airtight container or tightly wrapped in plastic wrap to prevent exposure to air and contaminants.
Temperature: Keep mozzarella sticks refrigerated at or below 40°F (4°C). If you've frozen them, ensure your freezer is at 0°F (-18°C).
Handling: Always wash your hands before and after handling mozzarella sticks to prevent cross-contamination.
Expiration Date: Adhere to the expiration date on the packaging. If you're unsure, err on the side of caution and discard any questionable mozzarella sticks.
Cross-Contamination: Avoid letting mozzarella sticks come into contact with raw meats or other potential contaminants.
Proper handling of mozzarella sticks is essential to maintain their freshness and avoid contamination. Here are some best practices for handling mozzarella sticks:
Refrigerate Promptly: After purchasing or cooking mozzarella sticks, refrigerate them as soon as possible. Keeping them at a consistent, cool temperature helps maintain their quality.
Use Airtight Containers: Store mozzarella sticks in airtight containers or resealable bags to prevent exposure to air and moisture, which can lead to spoilage.
Label and Date: Label the storage container with the date you refrigerated them. This helps you keep track of their shelf life and ensures you consume them within a safe period.
Avoid Cross-Contamination: Keep mozzarella sticks separate from raw meats and other potential contaminants in the fridge. Use separate cutting boards and utensils when preparing them.
Check Temperature: Ensure your refrigerator is set to the correct temperature, ideally below 40°F (4°C). This helps slow the growth of bacteria and extends the shelf life of your mozzarella sticks.
Avoiding Foodborne Illnesses
Foodborne illnesses can occur if mozzarella sticks are not handled or stored properly. Here are some tips to avoid them:
Inspect for Spoilage: Before consuming, check mozzarella sticks for any signs of spoilage, such as an off smell, mold, or sliminess. Refer to the section above on how to tell if mozzarella sticks have gone bad.
Reheat Properly: If reheating mozzarella sticks, ensure they reach an internal temperature of 165°F (74°C) to kill any harmful bacteria. Use a food thermometer to check the temperature.
Avoid Leaving Out: Do not leave mozzarella sticks out at room temperature for more than two hours. Bacteria can multiply rapidly at room temperature, increasing the risk of foodborne illness.
Practice Good Hygiene: Wash your hands thoroughly before and after handling mozzarella sticks. Clean all surfaces and utensils that come into contact with the food.
Follow Expiry Dates: Pay attention to the expiry dates on packaged mozzarella sticks. Consume them before the indicated date to ensure safety and quality.
By adhering to these safe handling practices, you can enjoy your mozzarella sticks while minimizing the risk of foodborne illnesses. For more information on food storage, check out how long do black olives last in the refrigerator?.
Frequently Asked Questions
Do Mozzarella Sticks Have to Be Refrigerated?
Yes. Mozzarella sticks are a dairy product and need to be kept in the refrigerator or freezer to stay safe. Storing them at room temperature leads to rapid bacterial growth. Keep them refrigerated at or below 40°F (4°C) if you plan to eat them within a few days, or freeze them for longer storage. The same applies to string cheese sticks — once you buy them, keep them chilled.
Do Cheese Sticks Expire or Go Bad?
Yes, mozzarella and cheese sticks do expire and can go bad. Always follow the use-by or expiration date on the package. An unopened, continuously refrigerated package may still be fine for a short time around its printed date, but you should always inspect it first: a sour smell, mold, discoloration, or a slimy texture all mean it's time to discard them. When in doubt, throw it out.
How Long Does Mozzarella Last in the Fridge?
Cooked or opened mozzarella sticks keep for about 5 to 7 days in the refrigerator when stored in an airtight container at 35°F to 40°F. To hold them longer, freeze them, where they keep their best quality for 2 to 3 months.
Can You Freeze Mozzarella Sticks?
Yes. Cheese sticks freeze well. Flash-freeze them on a parchment-lined baking sheet first, then transfer them to an airtight freezer bag so they don't stick together. They keep their best quality for 2 to 3 months and remain safe to eat for up to about 8 months at a steady 0°F (-18°C). You can cook most breaded mozzarella sticks straight from frozen.
Can You Eat Mozzarella Sticks Cold?
Fully cooked mozzarella sticks that have been stored properly and are still within their shelf life are safe to eat cold. That said, they taste far better reheated — heat them until the center reaches 165°F (74°C) so the cheese is melted and any bacteria are killed.
Can I Refreeze Mozzarella Sticks?
Refreezing mozzarella sticks is generally not recommended. When mozzarella sticks are thawed and then refrozen, the texture and taste can be compromised. Additionally, each cycle of freezing and thawing can increase the risk of bacterial growth. If you need to store mozzarella sticks for an extended period, it is best to keep them in the freezer from the outset and only thaw what you plan to use.
How Long Can Mozzarella Sticks Sit Out?
Mozzarella sticks should not sit out at room temperature for more than 2 hours. Bacteria can grow rapidly at temperatures between 40°F and 140°F, making it unsafe to consume food that has been left out for extended periods. If mozzarella sticks are left out for more than 2 hours, it is best to discard them to avoid the risk of foodborne illness.
Time
Safety
Less than 2 hours
Safe
More than 2 hours
Discard
Can I Store Mozzarella Sticks at Room Temperature?
Mozzarella sticks should not be stored at room temperature. They need to be refrigerated or frozen to maintain their quality and safety. Storing mozzarella sticks at room temperature can lead to rapid bacterial growth, making them unsafe to eat. Always keep mozzarella sticks in the refrigerator if you plan to consume them within a few days, or in the freezer for longer storage.
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When storing mozzarella sticks, it's crucial to keep them in an airtight container or tightly sealed bag to prevent exposure to air and moisture. This helps to maintain their texture and flavor. If you have freshly made mozzarella sticks, allow them to cool to room temperature before storing them in the refrigerator or freezer. In the refrigerator, place the mozzarella sticks on a shelf where the temperature is consistent, ideally between 35°F and 40°F. This helps to keep them fresh for a longer period. For longer storage, consider freezing the mozzarella sticks. Ensure they are well-wrapped to avoid freezer burn. See the freezing, thawing and reheating sections below for step-by-step freezer guidance.
