Keeping kosher by ingredient, for places without kosher shops or supervision. Which foods are kosher, why meat and dairy stay apart, and how to read a label.
Where there are no kosher shops or supervision, many people go by ingredient: they read the label instead of looking for a hechsher. This is how most Jewish families kept kosher before certification symbols became common, and many Conservative, Reform and Reconstructionist Jews still do. By Orthodox standards it is not enough on its own.
Kosher means “fit” or “proper.” The laws come from the Torah, mainly Leviticus 11 and Deuteronomy 14, and were developed in detail by the rabbis over many centuries.
Three questions decide whether a food is kosher:
Beef, lamb, poultry, and anything cooked with them, including broth and fat.
Milk, butter, cheese, yogurt, and anything with even a small dairy ingredient.
Fish, eggs, fruit, vegetables, grains. Can be eaten with meat or dairy.
Must both chew the cud and have split hooves.
Missing one or both signs.
Must have both fins and scales that come off.
No true scales, or not a fish at all.
Birds follow tradition rather than physical signs. Chicken, turkey, duck, and goose are accepted; birds of prey are not.
Preparation matters too. Meat and poultry must be slaughtered by a trained shochet, inspected for defects, and salted (or broiled, for liver) to draw out the blood. Certain fats and the sciatic nerve are removed. “Glatt” originally described smooth, defect-free lungs and is now often used to mean a higher standard.
The Torah repeats “do not cook a kid in its mother’s milk” three times. The rabbis read this as three rules: meat and milk may not be cooked together, eaten together, or used for profit together. Poultry counts as meat. Fish is pareve, though many avoid eating it on the same plate as meat.
In practice, a kosher kitchen keeps separate pots, dishes, cutlery, and often separate sinks or dish racks for meat and for dairy.
Waiting after meat. Customs differ by community:
| Wait | Common among |
|---|---|
| 6 hours | Most Sephardi and many Ashkenazi communities |
| 3 hours | Many of German-Jewish descent |
| 1 hour | Dutch-Jewish custom |
After dairy, most people simply rinse their mouth and eat something neutral before meat. Hard cheeses aged six months or longer are often treated like meat, with a full wait afterward.
A hechsher is a certification mark from a supervising agency. Well-known ones include the OU, OK, Star-K, and Kof-K. The letters printed next to the mark tell you the category:
Usually pareve. Look for the word “Pareve” to be sure.
Dairy, or made on dairy equipment.
No dairy ingredients, but made on dairy equipment. Not eaten with meat.
Contains meat or was made on meat equipment.
Contains fish.
Kosher for Passover. It does not mean pareve.
Tip: a plain “K” on a package is not a registered mark. Anyone can print it, so it tells you little on its own.
Tap a card to see the answer.