Frozen Meat and the Three-Day Rule

Meat has to be kashered by salting within three days of shechita. After three days the blood is held to have set, and salting can no longer draw it out — such meat may be roasted but not cooked.

Now hold that against the supply chain. Most imported meat is frozen at the abattoir, shipped, and eaten months later. On the face of it, every piece of it failed the three-day rule before it reached the country.

Why freezing answers it

The resolution reached by many Acharonim, and the reason the trade works at all, is that the blood does not congeal while the meat is frozen. The clock does not run. Immediately on thawing, the blood returns to its fresh state and comes out under salting like any other meat.

Which explains why the conditions below are about the integrity of the freeze rather than about the meat. The freeze is what is doing the halachic work.

Note that much imported meat is now kashered before freezing, abroad, and arrives already salted and frozen — which sidesteps the question entirely. Where you have the choice, that is the cleaner path, and lechatchila meat should not be left unkashered or frozen unkashered at all.

The thresholds

The 72-hour figure is the three-day rule restated in plant terms: the meat must be frozen before the clock would otherwise expire.

If the freeze lapses

A freezer failure, or meat left out of the cold room, is a real halachic event and not just a quality problem. Where the meat began to thaw, it must be kashered immediately, or soaked in water. If neither happened, it takes the status of meat that sat three days without kashering — roasting only.

Some are stringent about frozen meat over which three days passed without kashering in any case, holding that it should be salted and then roasted, as with any meat past three days.

Thawing, and why it cannot be rushed

Before kashering, the meat must be thawed completely — inside and out, with no solid core left. The reason is exact: salting does not draw blood out of frozen meat. Salt a piece that is still icy at the centre and the process has simply not happened there.

• Do not thaw in hot water, and do not put it in a warm place to speed it up.
• Lukewarm water is permitted.
• Where it was thawed in lukewarm water, it must then be soaked a further half hour as the pre-salting soak. Soaking that happened before freezing does not count toward it.

Salted while still frozen inside

This is the common failure, and the outcome depends on how far along you are when you notice.

1. Salted and already rinsed, then discovered to have been frozen inside: the salting did not work. Roasting only, not cooking.
2. Salted but not yet rinsed: wait until it thaws fully and leave it in its salt for the full salting period from that point. Bedieved it is then permitted even for cooking.
3. Rinsed, but it thawed afterwards: bedieved, it may be salted.

So noticing before the rinse is worth a great deal — which is an argument for checking the centre rather than the surface.

Two cases from the domestic kitchen

Meat in the fridge, not frozen, follows the ordinary rule. Three days without salting and it is forbidden for cooking, permitted for roasting. The fridge buys no time.

Meat frozen in ice water for a full day is a different matter: some hold it forbidden for cooking, because it was pickled in water, and pickling has the status of cooking — so it counts as having been cooked without salting. This applies specifically to meat lying in ice. Ordinary dry-frozen meat is not considered pickled and is not subject to it.

See also buying and handling meat. What to do with a particular piece is a question for your rav.