Measure out the frozen pineapple chunks, coconut milk, and ice cubes, then add them all into the blender.
Secure the lid and blend on high speed for about 30-45 seconds until the mixture becomes thick, smooth, and icy, with no chunks remaining.
Stop the blender and check the consistency; if it’s too thick, add a splash more coconut milk and blend briefly to loosen.
Once the slushie is creamy and scoopable, pour it into glasses or bowls.
Optional: garnish with a pineapple wedge or a sprinkle of shredded coconut for a tropical touch.
Serve immediately with a straw or spoon, enjoying the cool, tart, and creamy flavors of your homemade pineapple colada slushie.