food - In what way is kosher chicken different from brined chicken?

Over on Seasoned Advice, there have been a number of questions related to the nature of kosher meat and the amount of salt absorbed by the meat. Most recently, In what way is kosher chicken different from brined chicken in terms of salt absorption?

In order to fully explore the question, I figured I'd come over here to Jewish Life & Learning. For those not familiar with brining, non-kosher meat is often soaked for some period of time in water with a fair amount of salt (and sometimes sugar and other seasonings) to help with flavor of the meat.

Most cooking resources do not suggest brining kosher meat, since the salting process means that the meat is already saltier than non-kosher meat. Soaking kosher meat in a brine would result in meat that is too salty to eat.

However, the exact process of kashering meat is unclear, particularly to non-Jewish cooks who might simply be looking to determine salt levels in the meat. What are the halachic rules for how kosher meat (particularly chicken, since that's the question at hand) must be treated with salt to draw out the blood? How does the rinsing process affect the moisture level of the meat? And is there any standard analysis of how much sodium tends to be absorbed during the kashering process?

Answer

The koshering process as done today is fairly straightforward:

• Half-hour soak in water, then rinse.



• Apply "kosher" salt all over (internal cavities too), then leave it there for an hour.


• Triple rinse.

So yes, it is likely the finished product will be saltier than meat that was never treated with salt. (As I heard it, there was a sad case recently of non-kosher chickens being sold as kosher; when laboratory tests found near-zero salt levels in those birds, everyone knew something was wrong.) I can't tell you exactly how it compares to whatever brining process.

I did hear the question raised with regards to those on a low-sodium diet. Rabbis have allowed potassium chloride to be used instead of sodium chloride (while not quite as effective, it's close enough and employs the same mechanism); though practically today I'm told that if you take a piece of pre-salted-soaked kosher meat and leave it in a large bowl of water in the refrigerator overnight, then rinse it off, there will be very little salt remaining in the meat.