01 - Combine cold filtered water, freshly squeezed lemon juice, and maple syrup in a large pitcher. Stir thoroughly until the sweetener is completely dissolved.
02 - Whisk blue spirulina powder with room temperature water in a small bowl until fully dissolved and smooth, ensuring no lumps remain.
03 - Pour the dissolved spirulina mixture into the lemonade base. Stir gently until the beverage achieves an even, vibrant blue color throughout.
04 - Taste the lemonade and modify sweetness or tartness by adding more maple syrup or lemon juice as preferred.
05 - Add ice cubes to serving glasses or pitcher, then garnish with fresh lemon slices and mint leaves. Serve immediately while thoroughly chilled.