Challah (, hebrew: חַלָּה ḥallā [χa'la] or [ħal'lɑ]; plural: challot, challoth or challos) is a special bread of ashkenazi jewish origin, usually braided and typically eaten on ceremonial occasions such as shabbat and major jewish holidays (other than passover). ritually acceptable challah is made of dough from which a small portion has been set aside as an offering. challah may also refer to the dough offering. the word is biblical in origin, though originally referred only to the dough offering. similar braided breads such as kalach and vánočka are found across eastern europe.

Source: Wikipedia