Measure out tequila, lime juice, triple sec, and simple syrup, then pour them into your blender.
Add the ice cubes to the blender, making sure to pack them in tightly for a cold, chunky texture.
Secure the lid and blend on high speed, listening for the icy crunch and watching the mixture transform from liquid to a thick, slushy consistency.
Once the mixture is smooth and icy, stop the blender and check the texture—ideally, it should be thick enough to sip without spilling.
If desired, prepare the glass by rubbing a lime wedge around the rim and dipping it into salt for a flavorful touch.
Pour the slushy margarita into the prepared glass, allowing the frost to form on the outside and creating a cold sheen.
Garnish with a lime wedge or a sprig of mint for a pop of color and aroma, then serve immediately to enjoy the icy, citrusy refreshment.
