Use a sharp knife and cutting board to cut a ripe, seedless watermelon into 1-inch cubes, removing any rinds or excess skin.
Place the watermelon cubes into the blender, filling it up to about 2/3 full to allow space for blending.
Secure the lid on the blender and blend on high speed for 30-45 seconds until the mixture is completely smooth and frothy, with no chunks remaining.
Pour the blended watermelon into glasses, ensuring an even distribution of the vibrant pink liquid, and optionally garnish with fresh mint leaves for aroma and visual appeal.
4 cups watermelon, cubed
Serve immediately with a straw or stirring spoon to enjoy the icy, juice-filled texture.