The safety of cheese left out of the refrigerator overnight depends on the type of cheese and the ambient conditions in which it was left out. Generally, some types of cheese are more forgiving than others when it comes to being left at room temperature.
Hard cheeses (e.g., cheddar, parmesan) and aged cheeses tend to be less perishable due to their low moisture content. These cheeses can withstand being left out for a few hours without a significant risk of spoilage. However, leaving them out for extended periods may affect their taste and texture.
Soft cheeses (e.g., brie, camembert, feta) and fresh cheeses have higher moisture content and are more prone to bacterial growth at room temperature. Leaving soft cheeses out overnight is not recommended, as it can lead to spoilage and an increased risk of foodborne illness.
To ensure the safety of cheese:
Hard cheeses: If hard cheese has been left out overnight, inspect it for any signs of spoilage, such as an off odor, mold growth, or a slimy texture. If it appears and smells fine, you can still use it, but it's best to consume it sooner rather than later.
Soft cheeses: If a soft cheese has been left out overnight, it's safer to discard it. Soft cheeses are more perishable and can harbor harmful bacteria when left at room temperature for an extended period.
It's essential to remember that bacteria multiply rapidly in the "danger zone" temperature range of 40°F to 140°F (4°C to 60°C). Leaving perishable foods like cheese out at room temperature for a long time can increase the risk of foodborne illnesses.
To prevent cheese from spoiling, always store it properly in the refrigerator at the appropriate temperature and follow any storage instructions provided by the cheese manufacturer or seller. If you're ever unsure about the safety of a particular cheese, it's better to err on the side of caution and discard it to avoid any potential health risks.