Purple yam or ube is one of the most unusual delicacies in the world. The purple color is appealing and exciting. Purple yam is a root vegetable like sweet potato, which means itâ??s not a fruit. Purple yam is scientifically known as Dioscorea Alata. It is originated from Southeast Asia and currently consumed around the world. It became famous recently in Brooklyn when used as an addition to expensive donuts. If you are looking for the most photogenic food, this is the winner. Purple yam can be used in all desserts. Whether you are a fan of ice cream, pancakes, cookies, or some other sweets, purple yam is always the right choice. The well-known dessert made from purple yam is ube halaya.