Start by pouring the tequila, fresh lime juice, and simple syrup into a cocktail shaker. Shake vigorously for about 15 seconds until well combined and slightly frothy.
Prepare your glass by rubbing a lime wedge around the rim, then dip it into a shallow plate filled with coarse sea salt to create a salted rim. Set aside.
Add the ice cubes to your blender or directly into the shaker if crushing first. If using a blender, pulse until the ice is coarsely crushed, creating a gritty, snow-like texture.
Pour the crushed ice into the shaker with the mixed liquids, or if blending, add the liquids and ice directly into the blender and pulse a few times until the mixture is icy and granular but still thick.
If desired, add a splash of triple sec or orange liqueur for extra fragrance and sweetness, then give it a quick shake or pulse to combine.
Fill your prepared glass with the icy mixture, spooning it in to keep the granular texture intact. The drink should look frosty, with a gritty, slushy appearance and a slight graininess on the surface.
Garnish with a lime wheel or wedge on the rim for a bright, colorful finish, and perhaps a small sprig of mint if you like.
Serve immediately with a sturdy straw, encouraging slow sips that crackle with icy crunch and citrus punch. Enjoy the tactile, refreshing burst of flavors and textures with each sip.