Ashkenazi Jewish tradition; matzo ball soup is central to Passover (Pesach) Seder; the tradition of matzo during Passover traces to the biblical Exodus; matzo balls as we know them are c. 19th-century Eastern European development.
Matzo ball soup — light, fluffy dumplings of matzo meal in a golden, deeply flavoured chicken broth — is the Passover Seder's most iconic preparation, the dish that most families define as 'Jewish grandmother's soup'. Its preparation during Passover is not merely culinary but religious: chametz (leavened bread) is forbidden during Passover, and matzo meal (unleavened ground matzo) is the permitted grain product. The matzo balls are made from a deceptively simple mixture — matzo meal, eggs, schmaltz (rendered chicken fat) or oil, salt, and a small amount of soda water for lift — but achieving the 'floater' (light and airy) rather than the 'sinker' (dense and heavy) is the eternal debate and the mark of Passover cooking skill. The broth requires a deeply flavoured chicken stock, ideally made with a whole chicken, root vegetables, and abundant fresh dill.
Schmaltz (rendered chicken fat) produces the most flavourful matzo balls — vegetable oil is acceptable but produces a different result The mixture must rest 30 minutes in the refrigerator before shaping — the matzo meal hydrates and the fat solidifies; unrested mixture makes fragile balls Wet hands for shaping — the mixture is sticky; wet hands allow smooth, round shaping without the dough sticking Do not pack tightly — loose, gently formed balls stay light; packed balls become dense Soda water adds lift — the carbonation provides some leavening; replace with cold water for a denser ball Cook in salted water, not broth — boiling in broth makes the broth cloudy; cook separately and add to the broth at service
For guaranteed floaters: add a tablespoon of soda water and let the mixture rest for the full 30 minutes — the carbonation is released slowly during cooking and creates the lightness For a more flavourful matzo ball: add finely chopped fresh dill and white pepper to the mixture — these are traditional in many Ashkenazi family recipes The broth should be tasted and adjusted separately from the matzo balls — a good broth is rich, golden, and deeply flavoured before the balls are added
No resting time — un-rested mixture falls apart during cooking and produces dense, heavy balls Packing too firmly — over-worked, dense matzo balls are 'sinkers'; handle gently Cooking in the broth — clouds the broth and reduces its clarity Not enough salt — the balls themselves need seasoning; under-seasoned matzo balls taste bland against the flavourful broth Over-cooking — 35 minutes in simmering water is typically correct; over-cooked balls become mushy