Weber's Bakery on the Southwest Side opened at 4 a.m. and already had long lines early Tuesday.
The bakery said they will make thousands of the pastries Tuesday.
RELATED: Paczki Day: Bakeries celebrate Mardi Gras the traditionally Polish way
Paczki is Polish pastry with a sweet filling. Paczki are a popular indulgence for many before the start of Lent on Ash Wednesday.