Rescues · TO CURE
Off smells, or slime.
Why it happens
Insufficient salt, too warm, or a break in the cure. This is discarded, not trimmed.
Recovering it
An over-salted short cure can be rinsed and soaked in cold water for an hour or two, which pulls a surprising amount back out. A long cure cannot be desalted meaningfully. Case hardening is sometimes recovered by vacuum-sealing the piece and refrigerating it for a week so moisture equalises. Anything that smells wrong is discarded — curing is one of the few kitchen techniques where the failure mode is genuinely dangerous rather than merely disappointing.
The mechanism
Microbes need available water, and salt makes water unavailable — it binds water molecules and creates an osmotic gradient that pulls moisture out of both the food and any bacterium in it. That measure, water activity, is what determines shelf stability rather than moisture content as such. Sugar does the same thing more gently and offsets salt's harshness. Nitrite, in the pink curing salts used for charcuterie, does something salt cannot: it specifically inhibits Clostridium botulinum, which tolerates the low-oxygen environment inside a cured sausage or ham. That is why nitrite is not optional in those preparations and why it is also strictly dose-limited — it is genuinely dangerous in excess, which is the reason it comes dyed pink and must never be treated as interchangeable with ordinary salt. A short cure, like salting a steak for an hour, uses the same mechanism for seasoning rather than preservation.
The full TO CURE lesson — how to tell, where to practise it, what it carries to.