The Minhag of Shul Challas Erev Shabbos Hagodol
The (ארחות חיים (לר' אהרן הכהן מלוניל quotes the רא"ש:
"The Minhag of all Yidden
on Erev Shabbos Hagodol is to bake חלות.
They are called חלת עני* and in לע"ז (German/Yiddish) they are called "Shul Challas".
The Kehilla distributed the חלות to the poor.
From the time this Minhag was abandoned, a curse was sent on the grain.”
* It is interesting, that there is a Tumel in the Poskim regarding this חלת עני, starting with the מהרש"ל & מג"א
and others, yet very few are aware of this Minhag. Whereas Shlissel Challah, not a single Posek
mentions it and it is the most popular and known Minhag.(re Challah)