Most people meet tequila once, badly, at about nineteen, and file it under things that cause regret. The ones who come back later usually do it by buying the most expensive bottle on the shelf, an Extra Añejo, on the reasonable assumption that more ageing means better. Then it tastes like a slightly odd bourbon with almost no agave in it, and they decide they still do not get tequila. Both experiences share a cause: the label tells you how long the spirit sat in oak and says nothing about the decisions that determine whether it tastes of anything.
First, what is legally in the bottle
Tequila must be made from blue Weber agave grown in Jalisco and a handful of municipalities in Guanajuato, Michoacán, Nayarit and Tamaulipas, and it is regulated by the Consejo Regulador del Tequila. Every bottle carries a NOM number, a four-digit code identifying the distillery that made it. Different brands sharing a NOM came out of the same plant.
The important line is on the front. If it says 100% de agave, everything fermented was agave. If it does not, it is a mixto, and up to 49 per cent of the fermentable sugar can be cane or corn syrup. That is not snobbery, it is flavour: mixto is where most of tequila's bad reputation comes from. This line is the cheapest filter available.
The decision that matters most: how the agave is cooked
Agave stores its sugar as inulin, a long-chain carbohydrate that yeast cannot ferment. Cooking breaks it into fermentable sugars, and how you cook it determines what else you create along the way.
- Brick ovens (hornos). Steam-cooked over roughly a day or more. Slow heat drives caramelisation and Maillard reactions, producing the cooked-sweet-potato, baked-agave character that people mean when they say a tequila tastes like agave.
- Autoclaves. Stainless pressure cookers, several hours instead of a day. Efficient, and used by many good distilleries, but the shorter, hotter cycle develops less of that browned complexity.
- Diffusers. Raw or barely cooked agave is shredded and the sugars are washed out with hot water and acid. It extracts the most sugar for the least cost and produces a near-neutral base. Diffuser tequila is often reconstructed afterwards with additives to put back what was never made.
Nothing on a standard label tells you which was used, but knowing the distinction exists explains why two 100 per cent agave blancos can taste like different spirits entirely.
Milling is the smaller sibling of the same question. Most distilleries use roller mills. A few still crush cooked agave under a tahona, a volcanic stone wheel, and ferment with the fibre in the tank, which gives a rounder, more mineral texture. Fortaleza, El Tesoro and Siete Leguas are the names usually cited.
The age classes, and what oak actually does
The categories are simple and legally defined:
- Blanco: unaged, or rested up to 60 days.
- Reposado: 2 to 12 months in oak.
- Añejo: 1 to 3 years, in barrels no larger than 600 litres.
- Extra Añejo: over 3 years. This class only came into existence in 2006.
Here is the part nobody explains. Most tequila is aged in ex-American whiskey barrels, and oak works in one direction: it adds vanillin, coconut lactones, tannin and colour, and it slowly oxidises the spirit. It does not deepen agave character. It covers it. Agave's flavour compounds are delicate compared with oak extractives, so the longer a tequila sits, the more the vegetal, peppery, citrus-and-cooked-agave signature gives way to vanilla and wood.
That is why the price ladder is misleading. Extra Añejo costs more because capital sits in a warehouse for years, not because the liquid is more expressive. If what you like about tequila is the agave, a good blanco is the most honest expression of the distillery, and reposado is the sweet spot where oak softens the edges without taking over.
The additive problem
Mexican regulations permit up to 1 per cent by weight of additives, undeclared: caramel colouring, oak extract, glycerin and sugar-based syrup. One per cent sounds trivial. It is not. Glycerin at that level noticeably thickens the mouthfeel, oak extract fakes years of ageing in an afternoon, and sugar syrup rounds off anything harsh. A large share of the smooth, sweet, vanilla-heavy tequilas that sell well are built this way.
This also explains Cristalino, the aged tequila that has been carbon-filtered back to clear. Filtration strips colour, and it strips some flavour with it, so the style leans heavily on what is added afterwards. If you like it, that is fine, but it is a manufactured profile rather than a distillery one.
Highlands and lowlands, honestly
You will read that Los Altos highland agave gives sweeter, fruitier tequila and valley agave gives earthier, peppery tequila. As a generalisation it holds. But highland and valley distilleries also differ in cooking, milling, fermentation and yeast, and those choices affect flavour more than soil does. Treat the split as a hint about house style, not a law.
Who this is not for
If you are making margaritas, do not buy Añejo or Extra Añejo. Lime and orange liqueur flatten oak into something muddy, and a good blanco makes a far better drink. Anyone telling you to put a 3-year-old tequila in a cocktail shaker is helping you waste it.
If you actively dislike oak-forward spirits, skip the whole aged ladder and stay with blanco and lightly rested reposado. And if the reason you want tequila is that someone told you sipping tequila should be dark and smooth, that advice has it backwards: dark and smooth is usually the profile furthest from the plant.
What to do next
Buy one blanco from a distillery that cooks in brick ovens and taste it next to whatever aged tequila you own. If the blanco tastes of green vegetable, black pepper and warm cooked sugar while the aged one tastes mostly of vanilla, you have learned everything above in five minutes.
