Butterfly pea is a short-lived, herbaceous, perennial climbing, scrambling or trailing herb with a strong woody , its flowers are typically used to color food and beverages, as their bright blue color comes out when soaked. Dry Butterfly Pea Flowers also used for the traditional iced tea drink – just add a teaspoon of honey and squeeze of lemon to your tea and serve over ice. It has an amazing vivid blue color which changes to purple when the lemon is added.