What is Polish for "good luck"?

We’re getting a cake for a coworker who is leaving. Her first language is Polish, so I thought it would be fun to write “Good luck” in Polish on the cake. The dictionary says it’s “Powodzenia!” but I’m not sure I trust that. Does anyone here speak Polish and know for sure? Thanks.

It is, in fact, “Powodzenia!” Trust your dictionary.

Isn’t “Bad Luck” Polish for good luck?