The Greek New Year's Eve cake containing a hidden coin is called vasilopita.
Vasilopita is traditionally prepared for Saint Basil's Day, which is celebrated on January 1 in Greece and in Greek communities around the world. A coin, known as the flouri, is hidden inside the cake before it is baked. The person who receives the slice containing it is traditionally considered fortunate for the coming year.
Families often cut the cake in a set order, beginning with symbolic slices for religious figures or the household and then serving individual portions. The recipe differs by region and family: some versions resemble a sweet bread, while others are closer to a cake flavored with citrus or spices.
Vasilopita is sometimes translated simply as “Saint Basil's cake.” It should not be confused with baklava, a layered pastry made with filo, nuts, and syrup. The hidden coin is the defining feature of this New Year's tradition.