4) COOKING FOR A NON-JEW (OR A JEW WHO DOES NOT KEEP KOSHER)

Since the singular act of cooking meat and milk together is prohibited, even where one does not intend to eat the food - we need to be aware that a non-Jew (who is not bound by the laws of kashrut) may conceivably have a mixture of milk and meat in his pot - and therefore, we would not be permitted to cook for him. Furthermore, we would not even be permitted to switch on the stove, upon which his uncooked[1] pot of meat and milk is resting.

The same would apply to a Jew who does not keep kosher.

---

[1] If the milk and meat had already been cooked, and we simply heat it up again – we would not be guilty of ‘cooking’, because of the principle; ‘Ain Bishul Achar Bishul’ (‘There is no cooking after cooking’). The idea being that one can only be said to cook a substance ONCE.