Measure out the crushed ice and add it to your blender, filling it about halfway to ensure a slushy texture.
Pour in the tequila, triple sec, and freshly squeezed lime juice into the blender with the ice. Add simple syrup if you prefer a sweeter drink.
Add a pinch of salt to enhance the citrus flavor and balance the sweetness.
Secure the lid on the blender, then blend on high until the mixture is smooth and icy, with a slightly thick but pourable consistency. You should hear the blades whirring loudly, and the mixture should feel cold and slushy when you stop.
Once blended, check the texture—if it's too thick, add a splash of lime juice or a little more liquid; if too thin, add more crushed ice and blend briefly again.
Pour the frozen margarita into chilled glasses, optionally rimming the edge with salt for extra flavor and visual appeal.
Garnish with lime wedges or a sprig of mint for a fresh, colorful finishing touch.
Serve immediately and enjoy the refreshing, icy burst of citrus with every sip.