A coin is traditionally hidden in Greek vasilopita for New Year's Day luck.
Vasilopita is a Greek New Year's cake named for Saint Basil. Before the cake is served, a coin called a flouri is baked inside it. The person who receives the slice containing the coin is traditionally said to have good luck for the coming year.
The cake is commonly cut around New Year's Day, often after a ceremonial first slice. Slices may be assigned to religious figures, the household, family members or guests, depending on local and family custom.
Recipes vary by region and household, and vasilopita may be a sweet cake or a bread-like preparation. The hidden object is not a separate garnish or decoration: it is baked into the cake, so care is needed when eating it. Saint Basil's name explains the cake's connection with the Greek New Year.