The Greek New Year's cake that hides a lucky coin is called vasilopita.
Vasilopita is served at New Year in Greece and in Greek communities around the world. A coin, known as a flouri, is baked into the cake before it is served. The person who receives the slice containing the coin is traditionally believed to have good fortune during the coming year.
The cake is commonly cut ceremonially on New Year's Day, though some families cut it just after midnight on New Year's Eve. The first slice may be dedicated to Christ, Saint Basil, the household or another honored recipient before slices are distributed to family members and guests.
The name refers to Saint Basil the Great, whose feast day is celebrated on 1 January in the Greek Orthodox tradition. Recipes vary by region and family, and may resemble a sweet bread or citrus-flavored cake. Vasilopita is distinct from tsoureki, the braided sweet bread commonly associated with Easter.