The puffed rice cake is a flat hard food made with puffed rice. Typically, it is eaten as a healthy snack or used as a base for other ingredients.Some rice cakes are flavored. Common flavorings include chicken, sweet chili, cheese, butter, chocolate, caramel, or apple cinnamon.Rice cakes are often made into sandwiches, especially when used by dieters as a substitute for higher-caloric bread.Most rice cakes are round, though square varieties are available.