Cut the watermelon into chunks if needed, and add them to your blender.
Squeeze the juice of a lime into the blender to add a zesty brightness.
Add the fresh mint leaves for an aromatic, cooling flavor.
If desired, drizzle in honey for extra sweetness and blend until smooth.
Select the highest blending setting and blend until the mixture is frothy and icy, about 30 seconds.
Pause the blender and check the texture—look for a vibrant pink color with visible ice crystals.
Carefully pour the slushie into glasses, allowing some of the icy swirls to spill over the edges for visual appeal.
Garnish with additional mint leaves or small watermelon wedges if desired.
Serve immediately with a straw or spoon, and enjoy the refreshing burst of summer flavors.