How long does cheese expire after opening?
Different types of cheese are usable for longer periods of times than other. Fresh cheeses such as cream cheese, queso fresco, fromage blanc are typically OK up to about 2 weeks after the sell by date. Medium or hard cheeses such as Swiss, cheddar, blue cheeses really are fine up to 3-6 months. If the cheese starts to get moldy you can cut away the mold about 1/8″ deep and the remaining cheese is fine to eat. In the case of blue cheeses make sure it doesn’t have an “ammonia smell” which is a sign the cheese is beyond it’s edible stage. See Food Storage Guidelines for more information on storage times for dairy products.
