Matzah balls or matzo balls are Ashkenazi Jewish soup morsels made from a mixture of matzah meal, beaten eggs, water, and a fat, such as oil, margarine, or chicken fat. Known as knaidel in Yiddish, they resemble a matzah meal version of knödel, bread dumplings popular throughout Central European and East European cuisine.

Matzah, matzo, or maẓẓah is an unleavened flatbread that is part of Jewish cuisine and forms an integral element of the Passover festival, during which chametz is forbidden.