It depends on the type of cheese. Hard and semisoft cheeses like cheddar, Parmesan, and Swiss can be safely eaten after you cut away the mold, removing at least 1 inch (2.5 centimeters) around and below the moldy spot. Soft cheeses like ricotta, cream cheese, and cottage cheese should be thrown out entirely if you spot unintended mold.
Why Cheese Type Matters
Mold spreads through food by sending tiny root-like threads beneath the surface. In soft, high-moisture cheeses, those threads penetrate easily and deeply, meaning the mold you see on the surface is only a fraction of what’s actually growing inside. Bacteria can also grow alongside the mold in these moist environments, making contamination harder to detect and impossible to cut away.
Hard and semisoft cheeses have a much denser structure. Mold typically can’t penetrate far into a block of cheddar or Parmesan, which is why cutting a generous margin around the visible spot works. The key is keeping your knife out of the mold itself so you don’t drag spores into the clean portion of the cheese.
Hard and Semisoft Cheese: Cut and Keep
If you find mold on cheddar, colby, Swiss, Parmesan, or similar firm cheeses, you can salvage the rest. Cut at least 1 inch around and below the moldy area. Use a clean knife, and avoid letting the blade touch the mold. Re-wrap the remaining cheese in fresh parchment paper or wax paper before putting it back in the fridge.
This only applies to solid blocks or wedges. If you find mold in a bag of shredded or crumbled cheese, toss the whole bag. The loose pieces give mold easy access to spread throughout, and you can’t reliably cut away contamination when the cheese is already in small fragments.
Soft Cheese: Throw It Out
Cream cheese, cottage cheese, ricotta, and other soft fresh cheeses should go straight in the trash if mold appears. Their high moisture content means mold threads spread well beyond what’s visible, and harmful bacteria are likely growing alongside. No amount of scooping or trimming makes these safe.
Soft cheeses like brie and Camembert are a special case. They’re made with specific mold cultures that form the white rind, and that mold is safe for most people. But if you see new mold that looks different from the original rind (fuzzy green or black spots, for instance), discard the cheese. The intentional mold is safe; the uninvited kind is not.
What About Blue Cheese and Other Mold-Ripened Varieties
Blue cheeses like Gorgonzola, Roquefort, and Stilton get their characteristic veining from a mold culture added during production. This mold is safe for healthy adults. However, these cheeses can still develop additional, unwanted mold on the surface. If you spot new fuzzy growth that doesn’t look like the original blue-green veins, cut it away with at least an inch of margin, just as you would with any hard cheese.
The mold cultures used in cheesemaking have been selected over centuries for safety. The two main species are one used in blue cheeses and another used in bloomy-rind cheeses like brie and Camembert. These are fundamentally different from the wild molds that land on your cheese from the environment, which can produce harmful toxins.
Who Should Be Extra Cautious
Pregnant women, young children, older adults, and anyone with a weakened immune system should be more conservative. For these groups, eating cheeses made with unpasteurized milk carries additional risk, and the margin for error with mold is smaller. When in doubt, throwing the cheese away is the safer call.
Storing Cheese to Prevent Mold
Proper storage slows mold growth significantly. Keep cheese at around 37°F, ideally in the crisper drawer of your fridge. Once you’ve opened the original vacuum-sealed packaging, wrap the cheese in wax paper or parchment paper rather than plastic wrap. Parchment lets the cheese breathe slightly, which reduces the surface moisture that mold loves. For soft cheeses, an airtight container works well.
If you want to stock up, hard and shredded cheeses can be frozen for up to six months. The texture changes after freezing, making them better suited for cooking than eating on their own. Soft cheeses can technically be frozen too, but they tend to lose their creamy consistency.