1. Soak the butterfly pea flower in water to make blue, let it cool, put it in an ice tray, and freeze it into ice cubes
2. Mash the blueberries.
3. Put in a piece of lemon.
4. Add white ice cubes and blue ice cubes, add sparkling water
5. Sprinkle on Jie Jie Le, add mint leaves to decorate
6. You can also put a bunch of blueberries to decorate, so that the very delicious blue sky lactic acid drink is ready.
