Charles Ellicott Commentary Exodus 12:39

"And they baked unleavened cakes of the dough which they brought forth out of Egypt; for it was not leavened, because they were thrust out of Egypt, and could not tarry, neither had they prepared for themselves any victuals." — Exodus 12:39 (ASV)

Unleavened cakes: These are commonly eaten by the Arabs, who make them by mixing flour with water, and attaching round pieces of the dough to the insides of their ovens after they have heated them.