How Can You Tell Brined White Cheese Has Gone Bad?

Brined white cheese first shows signs of spoilage in the appearance of its brine: brine that is normally clear or slightly hazy turns cloudy, foams, or develops a thin film on the surface. This change is the first sign that unwanted bacteria or yeasts have started to grow in the brine. What signs should you look for on the cheese itself? Pink, orange, green, or blackish spots on the surface indicate mold or a colony of unwanted microorganisms; cutting away only that spot does not make brined cheese safe, because mold can spread easily through the entire block. Edges that become overly soft and start to melt, or cheese that yields more than expected when pressed with a finger, are another sign of spoilage. Smell is one of the most reliable indicators for brined cheese: fresh cheese has a mildly tangy, milky smell, while spoiled cheese develops a sharp ammonia or rotten egg odor. If you notice a much more bitter or sharp taste than expected while eating it, that is another warning sign, and the cheese should not be eaten; but never taste cheese that looks or smells questionable to decide whether it is safe. How long does it keep, and what role does the brine play? Unopened brined cheese in its original packaging can last for several months in the refrigerator, depending on its production date, because salty brine slows bacterial growth. After opening, keep the cheese in its own brine in a covered container and consume it within 1 to 2 weeks; cheese left dry without brine spoils much sooner. With homemade brined cheese or brined cheese sold loose, the brine's salt concentration drops over time and its protective effect weakens, so replacing the brine with fresh salted water every 3 to 4 weeks delays spoilage. Even if the brine looks clear, do not rely on it if the cheese has changed color or smell. Eating questionable cheese can cause nausea, cramps, and even food poisoning. If a piece looks or smells questionable, the safest choice is to throw it away without tasting it; this rule should be followed even more strictly for people with weakened immune systems and young children. Vacuum-packed sliced white cheese is a little different: because it is sold without brine, spoilage first appears as a swollen or slack package. If it has a sharp smell when opened, or the slices are stuck together and have a spongy texture, the cheese has spoiled much sooner than brined cheese and should be consumed within 3 to 4 days after opening. White cheese can be frozen, but during freezing and thawing, salty liquid separates from between the cells and the cheese becomes crumbly. This change is not a sign of spoilage; it only affects the texture, and thawed cheese is mostly used in cooked dishes. By contrast, if unfrozen cheese shows the same crumbling and weeping, it is a sign that the cheese has reached the end of its shelf life. Checking these signs before buying can prevent disappointment later: if the container holding the cheese at the store feels warm to the touch or the brine is cloudy, the product may have experienced a break in the cold chain. Avoid buying from such a container, and keep the cheese in the refrigerator or a cooler bag on the way home.