Add the frozen blue raspberry fruit, ice cubes, lime juice, honey (if using), and chopped mint leaves to the blender.
Secure the lid and blend on high speed until the mixture is smooth and ice is fully crushed, about 30-40 seconds. You'll see the mixture turn a vibrant blue with tiny ice shards.
Stop the blender and check the consistency; it should be thick, icy, and scoopable. If needed, add a splash more lime juice or a little water and blend briefly to loosen.
Pour the slushie into chilled glasses, ensuring an even, vibrant blue color with a slightly frosty top.
Garnish with additional mint leaves or a lime wedge for a colorful finishing touch.
Serve immediately with a straw or spoon and enjoy the refreshing burst of tart and sweet flavor in every sip.