Prep the watermelon: Remove the rind and cut the watermelon into cubes.
Chilling the cubes ahead of time makes the juice colder and brighter.
Blend: Add the watermelon, mint leaves, lime juice, salt, and 1/2 cup of cold water (or coconut water) to a blender. Blend on high until completely smooth, about 30–45 seconds.
Taste and adjust: Check sweetness and acidity. If the watermelon isn’t very sweet, add honey or maple syrup.
If you want more tang, squeeze in a bit more lime.
Strain (optional): For a smoother, lighter texture, pour the juice through a fine-mesh strainer into a pitcher, pressing gently with a spoon. If you like it pulpy, skip this step.
Thin if needed: If it’s too thick, stir in more cold water or coconut water until it’s easy to sip and ultra-refreshing.
Serve: Pour over ice, garnish with a sprig of mint, and enjoy immediately for the best flavor and chill.