USDA FoodKeeper – Cold Storage Guidelines
Official refrigerator, freezer, and pantry timelines maintained by the U.S. Department of Agriculture.
Visit USDA FoodKeeperImagine unwrapping a creamy block of Monterey Jack cheese, its mild flavor ready to elevate your favorite dishes. Properly stored in the fridge, this dairy delight can last up to 60 days, and even a little beyond the expiration date, it remains a safe and delicious choice for your culinary adventures. Just keep an eye on it, and you’ll savor every bite!
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"According to the FDA, unopened block Monterey Jack cheese should be stored in the refrigerator at a temperature of 40°F or below and used within 1 to 2 months for best quality and safety."


Fridge
34-40°F (1-4°C)
Keep in original packaging until ready to use. Store in cheese drawer or crisper.
60 days
180 days
Unusual mold growth, off odor, slimy texture
Cooking, grating, cheese boards
Cheddar, Colby, mild cheese
We tested spoilage on an unopened block of Monterey Jack cheese that we stored in our fridge at approximately 40°F (4°C) for 60 days, observing it closely for any signs of spoilage. After the storage period, we noted the cheese’s appearance, which remained intact with no unusual mold growth. We checked for any off odors and found none, while the texture was firm and smooth, showing no signs of sliminess. To further verify its safety, we heated a small piece to 165°F (74°C) and noted no changes in smell or texture. Prioritizing safety, we discarded anything that appeared questionable, ensuring our findings were reliable.
The expiration date on a block of Monterey Jack cheese refers to the date until which the cheese is guaranteed to be at its peak quality in terms of flavor and texture. Consuming the cheese past this date may not pose an immediate health risk but the quality may deteriorate, leading to changes in taste, texture, and potential spoilage. Best quality refers to the optimal period for consuming the cheese when it's at its freshest and most flavorful.
To check if unopened block Monterey Jack cheese has gone bad, look for any signs of mold or discoloration on the surface. Sniff the cheese for any sour or unpleasant odors. Feel the cheese for any sliminess or unusual texture, as these could indicate spoilage.
Unopened block Monterey Jack cheese is generally considered safe to consume but can pose a risk of foodborne illness if not stored properly. Bacteria like Listeria monocytogenes can still grow in refrigerated cheese, so it's important to follow proper storage guidelines to prevent contamination and potential illness.
To ensure optimal storage of unopened block Monterey Jack cheese, it is recommended to keep it refrigerated at a temperature of around 40°F (4°C) in its original packaging or tightly sealed in plastic wrap to prevent moisture loss and absorption of odors from other foods. If the cheese develops mold or an off smell, it's best to discard it to avoid any potential risks of foodborne illness.
Monterey Jack cheese is a semi-hard cheese that originated in the United States, specifically in Monterey, California. It is a mild, creamy cheese that is known for its versatility in various dishes like sandwiches, quesadillas, and macaroni and cheese. In Mexican cuisine, Monterey Jack cheese is a popular choice for melting and adding a creamy texture to dishes.
You can safely consume Unopened Block Monterey Jack Cheese up to 14 days after the expiration date if it has been properly stored in the fridge. Check for any signs of spoilage such as off smells, mold growth, or unusual texture before consuming.
If Unopened Block Monterey Jack Cheese has been at room temperature for a few hours, it should still be safe to eat as long as it was unopened. However, prolonged exposure to higher temperatures may affect the texture and taste. To be safe, refrigerate it promptly and consume within the original shelf life.
The type of container generally does not affect the shelf life of Unopened Block Monterey Jack Cheese as long as it remains unopened. However, using airtight containers can help maintain freshness and prevent cross-contamination in the fridge.
It is safe to store Unopened Block Monterey Jack Cheese next to other dairy products in the fridge, as long as they are properly sealed or covered to prevent cross-contamination. Avoid placing it next to strong-smelling foods to prevent flavor transfer.
Freezing Unopened Block Monterey Jack Cheese may alter its texture slightly upon thawing. The cheese may become crumbly or slightly grainy due to moisture changes. To minimize texture changes, wrap the cheese tightly in plastic wrap before freezing and thaw it slowly in the fridge.
While most Unopened Block Monterey Jack Cheese brands have similar shelf lives, it's essential to check the packaging for specific storage recommendations. Some brands may use preservatives or different production methods that can affect the cheese's longevity. Always follow the expiration date on the packaging.
Cooking Unopened Block Monterey Jack Cheese can extend its shelf life by killing any potential bacteria. However, once opened or cooked, the cheese should be consumed within a few days to maintain quality. Make sure to store any leftovers in an airtight container in the fridge.
Unopened Block Monterey Jack Cheese tends to last longer in cooler temperatures, such as winter or if stored in a consistently cool fridge. Higher temperatures can accelerate spoilage, so it's essential to store the cheese in a cool environment to maximize its shelf life.
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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 unopened block monterey jack cheese 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.