Any good quality tequila will allow for a great tasting margarita but, if you can take a bit of a splurge, then take the leap and purchase a 100 percent agave tequila, it really makes this cocktail shine and is worth the investment.
Classic Shaken Margarita
Makes 4 generous cocktails
Recipe from: Rick Bayless
1 cup tequila, preferably a young silver or reposado 100 percent agave tequila
1/2 cup Cointreau or other high quality orange liqueur
1/3 cup fresh lime juice, plus a little extra for moistening the rim of the glasses
A little sugar if necessary
About 1/3 cup coarse (kosher) salt for crusting the rims of the glasses
About 3 cups medium ice cubes
In a small pitcher, combine the tequila, orange liqueur and lime juice. Taste and add more lime or a touch of sugar if desired (keep in mind that it will taste a little tangier once it has been shaken).
Spread out the salt on a small plate. Moisten the rims of four 6-ounce martini glasses with a little lime juice (if you have a cut lime, even an already squeezed one, just moisten the rims by running it around them). Dip the rim of each glass in the salt, creating a thin, even crusted all around the rim.
Pour half of the margarita mixture into a cocktail shaker, add half of the ice cubes and shake vigorously for about 15 seconds (this is important to achieve the perfect strength-some of the ice needs to melt into the margarita-and the right degree of frostiness). Strain into two of the prepared glasses, then repeat with the remaining margarita mixture.
Relax and enjoy!