The origins of margaritas vary, but I really like the story of Margarita Sames. To cut the heat of a hot Acapulco afternoon, Margarita swirled together tequila, lime juice and Cointreau, a premium full-bodied orange liqueur. Supposedly her guests liked the concoction so much that her party kept going for two weeks afterward.
2 ounces of white tequila
1 ounce Cointreau or Triple Sec
1 ounce lime juice
Splash of Orange Curacao (optional)
Add crushed ice and shake well. Rim the outside of a glass with a lime wedge, and then twist in kosher salt. Strain mixture over ice.