Tequila was first distilled in the 1500-1600′s in the state of Jalisco, Mexico. Guadalajara is the capital of Jalisco and the city of Tequila was established in about 1656. This is where the agave plant grows best.

The agave is not a cactus as rumoured, but belongs to the lily family and has long spiny leaves (pincas). The specific plant that is used to make tequila is the Weber blue agave. It takes 8-12 years for the agave to reach maturity. During harvest, the leaves are cut off leaving the heart of the plant or pina which looks like a large pineapple when the jimadors are done. The harvested pina may weigh 200 pounds or more and is chopped into smaller pieces for cooking at the distillery. Tequila was first imported into the United States in 1873 when the first load was transported to El Paso, Texas. In 1973 tequila sales in the US topped one million cases. There are two basic types of tequila, 100% blue agave (cien por ciento de agave) tequila and mixto. The 100% blue agave tequilas are distilled entirely from the fermented juice of the agave.

All 100% agave tequilas have to be distilled and bottled in Mexico. If the bottle does not say 100% blue agave, the tequila is mixto and may have been distilled from as little as 60% agave juice with other sugars.

Grades of Tequila:

• Blanco: 100% agave tequila that is un-aged and untreated with additives.
• Reposado: 100% agave, “rested” tequila that has been stored in oak between two months and one year.
• Anejo: 100% agave, aged tequila that has been stored in oak at least one year.
• Mixto blanco: mixto tequila that is unaged.
• Mixto reposado: mixto tequila that has been stored in oak between two months and one year.
• Mixto anejo: aged mixto tequila that has been stored in oak at least one year.
• Joven abocado: mixto tequila that has been treated with additives to achieve an effect similar to aging.

All Tequila is Mezcal, but not all Mezcal is Tequila. —Tequila marketing mantra

Tequila, and its country cousin Mezcal, are made by distilling the fermented juice of agave plants in Mexico. The agave is a spiky-leafed member of the lily family (it is not a cactus) and is related to the century plant. By Mexican law the agave spirit called Tequila can be made only from one particular type of agave, the blue agave (Agave Tequiliana Weber), and can be produced only in specifically designated geographic areas, primarily the state of Jalisco in west-central Mexico.

Mezcal is made from the fermented juice of other species of agave. It is produced throughout most of Mexico. Both Tequila and Mezcal are prepared for distillation in similar ways. The agave, also know as maguey (pronounced muh-GAY), is cultivated on plantations for eight to 10 years, depending on the type of agave. When the plant reaches sexual maturity it starts to grow a flower stalk. The agave farmer, or campesino, cuts off the stalk just as it is starting to grow. This redirects the plant growth into the central stalk, swelling it into a large bulbous shape that contains a sweet juicy pulp. When the swelling is completed, the campesino cuts the plant from its roots and removes the long sword-shaped leaves, using a razor-sharp pike-like tool called a coa. The remaining piña (“pineapple”—so-called because the cross-thatched denuded bulb resembles a giant green and white pineapple) weighs anywhere from 25 to 100 pounds.

At the distillery the piñas are cut into quarters. For Tequila they are then slowly baked in steam ovens or autoclaves (oversized pressure cookers) until all of the starch has been converted to sugars. For Mezcal they are baked in underground ovens heated with wood charcoal (which gives Mezcal its distinctive smoky taste). They are then crushed (traditionally with a stone wheel drawn around a circular trough by a mule) and shredded to extract the sweet juice, called aguamiel (honey water).

The fermentation stage determines whether the final product will be 100 percent agave or mixed (“mixto”). The highest-quality Tequila is made from fermenting and then distilling only agave juice mixed with some water. Mixto is made by fermenting and then distilling a mix of agave juice and other sugars, usually cane sugar with water. Mixtos made and bottled in Mexico can contain up to 40% alcohol derived from other sugars. Mixtos that have been shipped in bulk to other countries for bottling (primarily the United States) may have the agave content further reduced to 51% by the foreign bottler. By Mexican law all 100% agave or aged Tequila must be bottled in Mexico. If a Tequila is 100 percent agave it will always say so on the bottle label. If it doesn’t say 100% it is a mixto, although that term is seldom used on bottle labels.

Source: Tastings.com