01 - In a large pitcher, combine the cold water, lemon juice, and maple syrup. Stir thoroughly until the syrup is completely dissolved.
02 - In a small bowl, whisk the blue spirulina powder with 1/2 cup of room temperature water until fully dissolved and smooth, ensuring no lumps remain.
03 - Pour the spirulina mixture into the lemonade base and stir until evenly colored throughout, creating a uniform blue hue.
04 - Taste the lemonade and adjust sweetness or lemon juice as desired to achieve your preferred balance of tart and sweet.
05 - Add ice cubes, lemon slices, and fresh mint leaves to the pitcher or individual serving glasses for presentation.
06 - Serve immediately while chilled. For a sparkling variation, replace half the water with chilled sparkling water just before serving.