Simple Margarita - Desert-Snow.com

1½ oz tequila (silver or gold)                               1 oz Cointreau or Triple Sec                             3/4 oz lime juice

Directions:

Mix ingredients, shake with 4 ice cubes and strain into a salt rimmed glass "on the rocks."  The original Margarita invented in the 1930's was served on the rocks.
To prepare a salt rimmed glass, dip the edge of the glass ½ inch deep into lime juice, then into course salt. Let it dry at room temperature.