Scotch Whiskey

Scotch whisky must be distilled and matured in Scotland, held in oak casks of no more than seven hundred litres for at least three years, and bottled at a minimum of forty percent alcohol by volume. Nothing may be added except water and plain caramel colouring. The same regulations define five sales categories, covering single malt, single grain, blended malt, blended grain and blended Scotch, so the phrase on the front of the bottle is a legal term rather than marketing language. The rules are narrow on purpose. They make the word a guarantee of origin and process, never of style or quality.

Speyside holds the densest concentration of distilleries and leans toward apple, honey and sherry cask richness. The Highlands cover the biggest area of the five and take in the broadest range of styles. Lowland malts are generally lighter and grassier. Islay is the peated island most people mean when they say smoky Scotch. Campbeltown is a small town on the Kintyre peninsula with a handful of distilleries and a salty, oily reputation. The regulations split these five: Highland, Lowland and Speyside are protected regions, while Campbeltown and Islay are protected localities. The distinction is legal rather than a matter of taste.

Peat is compressed bog vegetation, cut and dried and then burned to dry malted barley. Its smoke carries compounds called phenols, which cling to the grain and survive distillation. That is why the whisky tastes of smoke although it never touches a fire. Peat from different places burns differently, so an island peat and an inland one do not smell alike. Some distilleries publish a phenol figure in parts per million, usually measured in the malt rather than in the bottle. It describes how heavily the barley was peated, not how smoky the finished dram will taste.

Longer in oak means more tannin, more colour and more cask character, and past a certain point the spirit disappears under the wood. Age costs money because casks lose volume to evaporation every year they sit. A twelve year old from a distillery whose style suits you will often please you more than a twenty five year old from one that does not. Price tracks scarcity as much as it tracks quality.

Single malt is malted barley distilled in pot stills at one distillery. Blended Scotch mixes that malt with grain whisky, which is made from other cereals and, in practice, in continuous stills, and is lighter in body.

Smoke alongside smoke works, so a lightly peated Highland or an Islay malt sits happily with lamb chops off the coals. In real heat, a splash of water or a tall soda lengthens the whisky.