Butterfly Pea Flower: Blue Tea, Culinary Uses, Color Change, Safety, and Buying Guide
Butterfly pea flower is the edible blue blossom of Clitoria ternatea, a tropical climbing vine used to make naturally caffeine-free blue tea and natural food coloring. Its best-known trait is a striking pH-sensitive color change: a blue infusion turns violet, purple, or pink when lemon or lime juice is added. It is most useful as…