For other uses see Margarita (disambiguation).
Common ratios for a margarita are
The drink is usually served shaken with ice, on the rocks, or blended with ice (the "frozen margarita"). All three methods are frequently served with salt on the rim of the glass. Some bartenders specializing in tequila have the opinion that salt hides the flavor of bad Margaritas made with inferior tequilas. For people who insist on a salt rim, the bartender typically only coats half the glass or offers a straw, so that they can still taste the drink without being obscured by the salt's taste.
While the most common margaritas contain tequila, orange liqueur, lime or lemon juice, and sometimes an additional sweetener, such as simple syrup, many variations are becoming more and more common. Bottled lime juice (which contains sugar) is another method used to add sweetness.
Other than triple sec, other types of orange-flavored liqueur are sometimes used, such as Patrón Citrónge, Cointreau, blue curaçao yielding the blue margarita. The "grand", "royal", or "Cadillac" margarita often contains Grand Marnier or Gran Gala. Such higher quality or "top shelf" margaritas will usually use a better grade of tequila as well. Often, when sweeter fruit juices or freshly puréed fruits are added to the margarita, the amount of orange-flavored liqueur is often reduced or it is eliminated entirely. In addition to orange-flavored liqueurs, secondary liqueurs may occasionally be added to the cocktail, including black raspberry-flavored Chambord.
Fresh squeezed lime juice is the key ingredient. The most common lime in the U.S. is the thick skinned Persian lime. However, margaritas in Mexico are generally made with Mexican limes (Key limes). These are small, thin skinned limes and have a more tart and an often bitter flavor compared to Persian limes. Margaritas made with lemon have a softer taste, especially when Meyer lemon are used.
Alternate fruits and juice mixtures can also be used in a margarita. When the word "margarita" is used by itself, it typically refers to the lime or lemon juice margarita. But when other juices are used, the fruits are typically added as adjectives in the name, with lime juice or lemon juice added like a condiment (and a wedge of lime often added to the glass). Examples of popular combinations are:
There are many stories about who invented the margarita and why. The following are perhaps the most commonly repeated tales of the creator of the margarita cocktail:
According to Salvador Negrete, the son of Daniel Negrete, the family story goes that Daniel opened a bar at the Garci Crispo hotel with his brother, David. The day before David's marriage, Daniel presented the margarita as a wedding present to Margarita, his sister-in-law.
It was a combination of one-third Triple Sec, one-third tequila and one-third squeezed Mexican lime juice. The drink was not blended and was served with hand-crushed ice. 
Sames used one part Cointreau, two parts tequila and one part lime juice for her margarita. Knowing that most people drank tequila preceded by a lick of salt, she chose to garnish her cocktail with a rim of coarse salt.
Sames moved to El Paso, TX in 1958 where she was well known for her lavish parties. In 1982 she appeared on NBC's Today show demonstrating the proper way to make a margarita.
1 ounce tequila
Dash of Triple Sec
Juice of 1/2 lime or lemon
Pour over crushed ice, stir. Rub the rim of a stem glass with rind of lemon or lime, spin in salt—pour, and sip.
The first frozen margarita machine mix was invented in 1971 for Dallas restaurant Marianos by chemist John Hogan. He was also recognized by the Smithsonian as the inventor of the frozen margarita machine. Mr. Hogan realized that pure cane sugar was the secret to obtaining a solution that would be consistent and enjoyable for the masses.