1/2 cup freshly squeezed lime juice, from about 4 limes
1 tablespoon sugar
1/4 cup Grand Marnier
1/4 cup Triple Sec
1 cup Gold tequila
To salt the margarita glasses, rub the outside rims of 4 big glasses with a cut lime and press them lightly into a plate of kosher salt, to coat.
Combine the lime juice, sugar, Grand Marnier, Triple Sec, tequila, and a big handful of ice in a cocktail shaker (or blender). Shake the margarita really well, for a good 20 seconds, and strain into the salt rimmed glasses filled with ice.