Cheese is a milk-based product that is deliberately "spoiled" and is
full of bacteria. That's primarily what gives cheese its distinctive
flavour and aroma. However, cheese has a much longer shelf-life than the
milk from which it is derived. Indeed, certain varieties that are
encased in a protective rind and can take years to fully mature. And yet
manufacturers will insist it must be eaten in 2 to 5 days of opening!
This is sheer nonsense and is only a legal precaution.
The
actual duration a cheese will "keep" varies according to the type of
cheese. Once exposed to air, the bacteria begin to rapidly multiply,
producing a visible green-blue mold. However, many cheese are visibly
moldy by design, so any additional mold is unlikely to do you any harm.
If the cheese is not intentionally moldy, people will often scrape or
cut away the mold, but it is perfectly edible. The only real difference
is a stronger taste and aroma.
Eventually, though, cheese will
spoil for real. The first visible sign of spoiling is a darkening of the
colour, a result of the cheese drying out. However, the interior of the
cheese may be perfectly fine; you can simply cut away the harder
protective exterior. The only reason to throw away cheese is when it has
completely dried out. At that point, it can be said to have fully
spoiled. It may well taste fine, but it is unpalatable. If there's no
moisture left then it cannot even be melted at cooking temperature.
By the way, i just ate a molded cheese few weeks ago.
Mmm...still alive, guess it's fine to eat it after-all. LOL!
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