It's a long-time Polish tradition in Buffalo, but I was surprised how many people didn't know how to pronounce the name.  Paczki is a Polish word describing what basically is a big jelly-filled donut.

Catholics traditionally give something up during the Lenten season....sweets, drinking, baked goods,etc.  The old Polish custom was use up all the sugar, lard and flour in the house in the days prior to Lent and what many people did was to make huge pastries or donuts.  Over the years traditionally large jelly donuts known as Paczki (poonch-key) came to symbolize that tradition.

The day before the beginning of Lent (Ash Wednesday) became what we know today as Fat Tuesday.  That's the day people would eat up all those baked goods.

So I took a small card with me with the word "Paczki" on it and asked people to pronounce it.  Here's how it went: