Beef is kosher when it comes from the right animal, is slaughtered by a trained ritual slaughterer, passes an internal organ inspection, has specific fats and nerves removed, and undergoes a salting process to draw out blood. Each step must be supervised, and skipping any one of them disqualifies the meat entirely.
The Animal Itself Must Qualify
Not every animal can produce kosher beef. The Torah requires that a kosher land animal have two traits: it must chew its cud (be a ruminant) and have fully split hooves. Cattle meet both criteria, as do goats, sheep, bison, deer, and several other species. A pig, for example, has split hooves but doesn’t chew its cud, so it fails the test. Both traits must be present.
Ritual Slaughter: Shechita
How the animal is killed matters as much as what the animal is. A trained practitioner called a shochet performs shechita, a single swift cut across the throat with an extremely sharp, smooth blade. The cut severs the trachea and esophagus, causing rapid blood loss and a quick death. Any nick or imperfection in the blade, hesitation during the cut, or excessive pressure can invalidate the slaughter, making the meat non-kosher regardless of everything else that follows.
Lung and Organ Inspection
After slaughter, a trained inspector checks the animal’s internal organs for defects that would classify it as “treifah,” meaning it had a condition that would have caused it to die on its own. The lungs get the most attention. An inspector feels the lungs while they’re still inside the chest cavity, then examines them visually after removal, looking for adhesions: bands of scar-like tissue that may signal a hole or perforation in the lung. A hole in the lung disqualifies the animal entirely.
This is where the term “glatt” comes in. Glatt is Yiddish for “smooth” and refers specifically to lungs found completely free of adhesions. For Sephardic Jews, who follow the rulings of the Shulchan Aruch, only glatt meat is acceptable. Ashkenazic tradition technically allows up to two small, easily removable adhesions and still considers the animal kosher (though not glatt). In practice, though, most major kosher certification agencies in the United States, including the OU, now certify only glatt meat.
One exception worth noting: young, tender animals like calves and lambs must meet the stricter glatt standard for all communities, even Ashkenazic ones. Inspectors also check the second stomach (the reticulum) for punctures, which can happen when cattle accidentally swallow nails or other sharp metal objects mixed into their feed.
Removing Forbidden Fats and the Sciatic Nerve
Even after passing inspection, the meat isn’t ready yet. Certain internal fats, called chelev, must be carefully cut away. These are specific hard fats surrounding the kidneys, stomach, and other organs, distinct from the regular fat marbled through muscle or found just under the skin. The prohibition covers chelev from cattle, sheep, and goats and comes directly from Leviticus.
The sciatic nerve, running through the hindquarters, must also be completely removed. This process, called nikkur (or porging in English), is painstaking work that requires anatomical knowledge, surgical precision, and years of apprenticeship. It cannot be learned from a book alone, because much of the technique depends on local tradition and hands-on practice.
Nikkur on the front of the animal is relatively straightforward. The forequarters contain almost no forbidden fat from rib twelve forward, so the main task is removing several blood vessels. The hindquarters are a different story. The sciatic nerve is located there, and the area contains far more chelev, requiring meticulous dissection. Because of this difficulty, and a historical shortage of skilled porgers, most Ashkenazi communities in North America and Europe simply sell the entire hindquarter to the non-kosher market. This is why you won’t find kosher filet mignon, sirloin, or flank steak at most kosher butchers. The cuts aren’t inherently non-kosher; they’re just too labor-intensive to process. In some Sephardic communities and in Israel, skilled porgers do process hindquarters, making those cuts available.
Soaking and Salting to Remove Blood
The Torah prohibits consuming blood, so all kosher beef goes through a soaking and salting process before it reaches the consumer. The meat is first submerged in cold water for 30 minutes to soften the surface and open the pores. After a rinse, coarse salt is spread liberally over every surface. This is the origin of the product Americans call “kosher salt”: it’s the coarse-grained salt originally used for koshering meat, chosen because its large crystals are easy to rinse off without dissolving into the flesh.
The salt stays on for one hour, drawing blood to the surface. Afterward, the meat is rinsed thoroughly in cold water three times to remove all salt and extracted blood. The process requires a dedicated tub for soaking and a grooved board for salting that allows blood to drain away from the meat. Most consumers buy beef that has already been soaked and salted by the processor, so this step is invisible by the time the package reaches the store.
Supervision and Certification
Every stage of this process, from slaughter through salting, is overseen by a mashgiach, a kosher supervisor whose job is to ensure compliance at each step. The mashgiach reviews ingredients, watches over processing, and verifies that all equipment is clean and free of residual non-kosher food. In a slaughterhouse, this means someone is present for every animal.
The visible result of all this supervision is the hechsher, the certification symbol printed on kosher meat packaging. Different organizations issue their own symbols (the OU symbol is one of the most widely recognized in the U.S.), and each represents a specific set of standards. A package marked “glatt kosher” signals that the animal’s lungs passed the stricter adhesion-free standard. Consumers who follow particular traditions often look for specific hechshers that match their community’s standards.
Why Kosher Beef Costs More
The price premium on kosher beef reflects every layer described above. Trained slaughterers and inspectors must be present for each animal. A meaningful percentage of cattle fail the lung inspection and are diverted to the non-kosher market, reducing yield. The hindquarters of most animals are sold off as well. Add the labor of porging, the soaking and salting process, and continuous rabbinic supervision, and the cost per pound of usable kosher beef rises well above conventional beef. The economics explain both the higher price tag and the more limited selection of cuts available at kosher butchers.