anchan magic: butterfly pea herbal drink

This beautiful blue drink made from dried butterfly pea flowers (อัญชัน) turns purple with a squeeze of lime juice. Said to be an antioxidant (bluechai.com) with properties to improve vision anchan is used not only to prepare a cool refreshing drink, but it is also used as a natural food coloring for sticky rice (ข้าวเหนียว) and tapioca pearls (สาคู).