2,361. Udder

Maachalos Assuros 9:12

Udders are prohibited by rabbinic enactment, meat that was cooked in milk from a slaughtered animal not being prohibited under Biblical law. If one cuts an udder open and removes its milk, one may then roast and eat it. If he cut it both lengthwise and crosswise and then pressed it against a wall until no moisture remained from its milk, it may then be cooked with other meat. If an udder wasn’t cut open, cooking it is prohibited; this is so even if it came from a young animal that never nursed or from an old animal. If a person violated the law and cooked the udder by itself, it may be eaten; if he cooked it with other meat, it must have 60 times the volume of the udder, the udder counting in the 60 (i.e., a ratio of 59:1 rather than 60:1).

Maachalos Assuros 9:13

Pursuant to the previous halacha, if all the food in the pot including the udder is 60 times the volume of the udder alone, the udder is prohibited but the rest is permitted. If it’s less than 60 times the udder’s volume, then it’s all prohibited. Either way, if the udder falls into another pot, it can render it prohibited and we require 60 times its volume as in the first case. This is because the udder that was cooked became a prohibited piece of meat. We measure the udder as of the time it was cooked, not as it was when it fell in.