Bring 3 cups of water to a boil. As soon as it comes to a boil, remove it from the heat.
Add the dried butterfly pea flowers and white sugar. Stir until the sugar dissolves into solution.
Allow the flowers to steep for 10-15 minutes, until the tea is dark blue in color. Using a tea strainer, strain the flowers from the tea.
Allow the tea to come to room temperature, then place in refrigerator. Chill until the tea is cold. Pour over a glassful of crushed ice, and enjoy!
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Notes
Feel free to use fresh butterfly pea flowers if they are available to you.
If you add a squeeze of lemon juice, the bright blue drink will turn a beautiful magenta color due to the pH color changing anthocyanins in the butterfly pea flower.
If you'd like to make Butterfly Pea Lemonade, see this recipe for the exact proportions.