שולחן ערוך יורה דעה · סימן צ״ז

English

Prohibition of Kneading Bread with Milk It is forbidden to knead bread with milk, lest one later eat this bread with meat. If it is already done, it is forbidden to eat the bread, even alone. But if the bread is small and intended for one meal, or if it is given an unusual shape to mark that it should not be eaten with meat, it is permitted. Similarly, bread baked in an oven greased with tail fat is comparable to bread kneaded with milk. G LOSS : This is why it is customary to knead bread with milk during the Feast of Weeks, and with fat for Sabbath meals, firstly because the quantity is insignificant, and secondly because these breads are given a shape distinct from ordinary breads. This is all the more permitted for flans or pies. One should not bake bread in the oven together with flans or pies, lest the fat from these flows under the bread; if so, the bread is considered kneaded with fat. It is customary to place the bread near the oven's opening. Deliberately, one should refrain from such a procedure, even when baking them in a pan.

English

Bread should not be baked in an oven greased with tail fat without heating it white-hot inside; external heating is not sufficient, even if the oven is masonry.

English

It is forbidden to eat with dairy foods bread baked together with roasted meat or fish fried in the oven together with meat. This applies only if the oven is small; but it is permitted to eat them with dairy foods if the oven has the capacity of five hundred and eighteen eggs and its opening remains open; this is also permitted, even if the oven is small, if the roasted meat is covered or the opening of the mold in which the pies are baked is closed. G LOSS : See further, § 108, regarding the custom in such a case.