In Greek New Year's Eve celebrations, the traditional cake containing a hidden coin is called vasilopita.
The cake is associated with Saint Basil, or Agios Vasileios, whose feast day is celebrated in Greece on January 1. Families cut the cake at midnight or on New Year's Day, often assigning the first slices symbolically to religious figures, the household, and family members.
A coin called a flouri is baked into the cake before it goes into the oven. The person who finds it is traditionally considered especially fortunate in the coming year. Because the coin is hidden, the cake should be cut and eaten carefully.
Vasilopita varies by region and household. Some versions resemble a sweet bread, while others are more like a moist cake. It is not the same as tsoureki, the braided sweet bread most closely associated with Greek Easter.