What is the halacha for ashkenazim regarding fat on meat

The laws of forbidden fats (chelev) on meat are a significant area of Jewish dietary law. For Ashkenazim specifically, the accepted practice is to not perform the complex nikkur (removal of forbidden fats and veins) on the hindquarters of animals, making those cuts effectively unavailable for kosher consumption in Ashkenazic communities. Instead, Ashkenazim purchase only forequarter cuts, from which chelev removal is more straightforward.

Key Takeaways

Chelev (חֵלֶב), the forbidden fat of certain animals, is explicitly prohibited by Torah law — violation carries the penalty of karet (spiritual excision).
The nikkur (removal of forbidden fats) of hindquarters is technically permitted but extremely complex, requiring expert knowledge.
Ashkenazic communities universally adopted the custom to avoid hindquarter meat entirely, since qualified menakker (fat-removal experts) became rare in their regions.
Sephardic communities, particularly in Israel and Mediterranean lands, do permit hindquarter meat after proper nikkur by a trained expert.
This is both a Torah-level prohibition (for chelev itself) and a communal custom (regarding hindquarters specifically).

The Torah Prohibition of Chelev

The Torah explicitly forbids eating chelev in Leviticus 7:23:

"כׇּל־חֵ֜לֶב שׁ֥וֹר וְכֶ֛שֶׂב וָעֵ֖ז לֹ֥א תֹאכֵֽלוּ" "All the chelev of ox, sheep, and goat — you shall not eat."

The Torah distinguishes between chelev (forbidden fat, surrounding internal organs) and shuman (permitted fat found between muscles and under the skin). Only the fat of domesticated kosher animals (behemot) — ox, sheep, and goat — is subject to this prohibition; fat of wild kosher animals (chayot) like deer is permitted.

The punishment for intentionally eating chelev is karet (כָּרֵת), spiritual excision [Leviticus 7:25], making this a Torah-level prohibition of the most serious kind.

The Process of Nikkur

Nikkur (נִקּוּר), the removal of forbidden fats and blood vessels, must be performed by a trained expert called a menakker (מְנַקֵּר).

The Talmud in Chullin 93a discusses which fats and sinews must be removed. The process includes removing:

The chelev surrounding the kidneys, stomach, and other organs
The sciatic nerve (gid ha-nasheh) — prohibited since Jacob's wrestling match (Genesis 32:33)
Forbidden blood vessels throughout the meat

The forequarters require nikkur as well, but the procedure is far simpler than for the hindquarters, which contain the bulk of the forbidden fats and the sciatic nerve running deep through the thigh.

The Ashkenazic Custom Regarding Hindquarters

The Core Ruling

Rema (Rabbi Moshe Isserles), the primary authority for Ashkenazic halacha, in his glosses to Shulchan Aruch, Yoreh De'ah 64:1, rules that Ashkenazim have taken on the custom (minhag) not to perform nikkur of the hindquarters:

The practice in these lands (Ashkenaz) is not to engage in the nikkur of the hindquarters at all, and they are sold to non-Jews.

The reasoning is that over time in European communities, the expertise required for proper hindquarter nikkur was lost or became extremely rare. Rather than risk consuming forbidden chelev, the entire hindquarter was sold off to non-Jews.

Why the Hindquarters Are More Complex

The hindquarters contain:

The chelev of the haunches
The sciatic nerve (gid ha-nasheh) which runs deep into the thigh muscle
Multiple layers of forbidden fat interwoven with permitted fat — making complete removal very difficult

Rashi and the Rishonim note that improper nikkur poses a serious risk of leaving forbidden fat behind, which is why communities without reliable experts simply avoided it altogether.

Sephardic vs. Ashkenazic Practice

| | Ashkenazim | Sephardim | |---|---|---| | Hindquarters | Not used (sold to non-Jews) | Permitted after proper nikkur | | Nikkur expertise | Largely discontinued in Europe | Maintained in Sephardic communities | | Legal basis | Minhag (custom) of Rema | Full nikkur as ruled in Shulchan Aruch |

The Shulchan Aruch of Rav Yosef Karo (Yoreh De'ah 64-65), written from a Sephardic perspective, permits hindquarter meat after proper nikkur by a qualified expert. This remains the Sephardic practice today, particularly in Israel where trained menakkerim are more common.

Practical Implications Today

In Ashkenazic butcher shops (including most American and European kosher butchers), you will find only forequarter cuts: chuck, brisket, rib, and shoulder.
Hindquarter cuts — sirloin, tenderloin, filet mignon, London broil — are generally not available in Ashkenazic-certified kosher shops.
In Israel, some Sephardic-certified butchers do sell hindquarter meat after nikkur, making cuts like filet available with kosher certification.
An Ashkenazic Jew who follows the Rema's ruling should not eat hindquarter meat even if a Sephardic menakker certified it, unless their rabbi advises otherwise.

For personal guidance on your specific situation, consult your local rabbi or posek.