Chop a handful of fresh mint leaves into smaller pieces with a knife on the cutting board to release more flavor.
4 cups cubed watermelon
Add the cubed watermelon and bruised mint leaves into the blender jar.
4 cups cubed watermelon
Blend on high speed for about 30 seconds until the mixture is smooth and frothy, with no visible chunks and a vibrant color.
Place a fine mesh strainer over a large bowl or pitcher and pour the blended mixture through, using a spoon to press out excess liquid and separate out the pulp from the juice.
Distribute the strained juice into glasses; optionally add ice cubes and garnish with a small sprig of fresh mint for presentation before serving.
4 cups cubed watermelon