18. One may not make milchige dough to bake milchige bread. Likewise, one may not make fleishige dough. Since the bread shows no visible sign that is fleishigs or milchigs, we are concerned someone may eat it with the other type. If one kneaded or baked milchige or fleishige bread, the bread may not be eaten, even by itself (שו"ע יו"ד סי' צ"ז ס"א ). However, it may be sold to a non-Jew (פרי תואר הובא בדרכ"ת סקל"ב ).
Permissible Ways to Make Milchige or Fleishige Bread
19. Small amount. There are two permissible ways to make milchige or fleishige bread. The first way is by making a small quantity, i.e., only enough for one meal (שו"ע שם ) or one day (רמ"א שם ).
20. Indication on the bread. Another permissible way is by making an indication on the bread, e.g., giving it a unique shape, before baking it (שו"ע שם ). If it was baked without any sort of indication, it becomes ossur, and making an indication afterward does not help (חוו"ד סק"ו ופמ"ג סק"א ).
21. Making the bread in a different manner only helps for one's family members. It does not allow one to sell it to the public since not everyone knows what it signifies. The storeowner cannot be relied upon to inform all his customers since people sometimes forget (מהרי"ט הובא בפתח"ת סק"ג ). However, some say that Jews in big cities all over the world bake milchige bread by making it in a unique manner and also sell it to guests if it is well-known that it is milchigs (יד יהודה הקצר סק"ז ).
22. Pizza. One may bake dough that everyone knows is milchigs. Thus, pizza, which is milchigs by nature and clearly has cheese on it, may be made without a special indication (יד יהודה שם סק"ח ). Therefore, pizza may be sliced into squares or triangles; it does not need to be cut specifically into triangular slices as a sign that it is milchigs [It should be noted that of recent, many prepare meat pizzas, therefore one should be careful to be and make others aware that it is meaty].
