A single malt is the product of one distillery, made from malted barley alone and distilled in copper pot stills. A blended Scotch is a marriage of malt whiskies from several distilleries with lighter grain whisky made in a column still. That is the whole of the single malt vs blended Scotch distinction in law, and nothing in it says which is better. The rest of the argument is about style, consistency, price and what you are pouring it for.
The snobbery runs one way. Single malts are marketed as the authentic article and blends as the compromise, which is odd for a category where blends have accounted for the large majority of Scotch sold around the world for a century and a half, and where the master blenders at Johnnie Walker or Chivas have access to more casks than any single distillery manager will see in a lifetime. A good blend is a harder thing to make than a good single malt. It is also, bottle for bottle, usually the better value.
What the law actually says
The Scotch Whisky Regulations 2009 define five categories. Single malt Scotch whisky must be distilled at a single distillery from water and malted barley only, in pot stills, by batch distillation, and since 2012 it must also be bottled in Scotland. Single grain is the same single-distillery requirement applied to whisky made from other cereals, or from malted barley in a continuous still. Blended malt is a mix of single malts from more than one distillery; blended grain is the equivalent for grain whisky. Blended Scotch whisky, the category most people mean by the word blend, combines one or more single malts with one or more single grains.
Everything in all five categories must be matured in oak casks of no more than 700 litres for at least three years in Scotland and bottled at 40 per cent alcohol or more. An age statement on any Scotch, single malt or blend, is the age of the youngest whisky in the bottle. A 12-year-old blend may contain 20-year-old malt; it may not contain anything younger than 12.

Pot still, column still and why it matters
The flavour gap between malt and grain whisky starts in the still. A copper pot still works in batches, and because it is inefficient it carries a great deal of the fermented wash’s character over into the spirit: fruit esters, cereal, sulphur that copper will later strip out, and the smoke if the barley was dried over peat. The column still, patented by Aeneas Coffey in 1830, runs continuously and produces a spirit of much higher strength and much less congener weight. Grain whisky off a column still is light, sweet and faintly grassy, and after years in cask it tastes mostly of the oak.
This is why grain whisky is the canvas of a blend rather than its subject. It softens, stretches and binds the malts, lowering cost and smoothing out the edges that would make a mix of Islay, Speyside and Highland malts fight each other. The proportion varies by brand and is never published, but a standard blend is typically more grain than malt, and the premium blends shift the ratio the other way. A blended malt, with no grain at all, sits closer to single malt in weight and price.
Blending as a business dates to the 1860s, when Andrew Usher in Edinburgh began combining malts with the new grain spirit, and the Spirits Act of 1860 permitted blending under bond. The results were lighter and more consistent than the fierce Highland malts of the day and travelled better, and they built the Scotch industry as it exists. The single malt as a marketed category is far younger; Glenfiddich’s decision to promote its malt outside Scotland in the 1960s is usually taken as the start.
Single malt vs blended Scotch in the glass
A single malt tastes of a place and a set of decisions: the shape of the stills, the length of fermentation, the peat level of the barley, the casks. Laphroaig is medicinal smoke and seaweed; Glenmorangie is orange peel and vanilla; Springbank is oily, salty and faintly funky.
A blend tastes of a house style, held steady for decades by a blender whose job is to make this year’s Johnnie Walker Black Label indistinguishable from the last. Blends tend to be lighter in body, rounder and less emphatic in any one direction. The best of them have real complexity, but it arrives as balance rather than as a single dominant note. They also take ice, soda and the rest of a cocktail better than most single malts, because a blend was built to be mixed and a single malt was built to be noticed.

Which to pour, and when
Pour a single malt when the whisky is the point: after dinner, neat or with a few drops of water, in a tulip-shaped glass that collects the aroma. The water is not an insult to the whisky. A splash at cask strength or even at 46 per cent opens the spirit and lowers the alcohol burn that would otherwise mask what you paid for. Ice closes a single malt down and is better saved for the blend.
Pour a blend for a highball, a Rob Roy, a Penicillin, a Blood and Sand or anything else with a second ingredient, and for the kind of evening where the whisky is company rather than the subject. The highball in particular, two parts cold soda to one part whisky over good ice, is how most Scotch is drunk in Japan and is the best argument for a 12-year-old blend in the house. A blended malt is the compromise for people who want malt weight in a cocktail; Monkey Shoulder and Johnnie Walker Green Label are the standard examples.
Bottles that show the categories well, all widely available in the US:
- Johnnie Walker Black Label 12 Year Old: the reference blended Scotch, with enough Islay smoke in the mix to read as serious and enough grain to make a highball.
- Chivas Regal 12: softer and more honeyed than Black Label, built around Strathisla malt; the blend for someone who finds smoke a chore.
- Compass Box Artist Blend: a modern blended Scotch from a company that publishes what goes into its bottles, which the industry historically has not.
- Monkey Shoulder: a blended malt of Speyside whiskies with no grain, made for mixing and priced accordingly.
- Glenfiddich 12 Year Old: the best-selling single malt in the world and still a fair, pear-scented introduction to Speyside.
- Talisker 10 Year Old: Skye peat, black pepper and sea spray; the single malt to pour for someone who thinks they want Islay but may not.
- Lagavulin 16 Year Old: the Islay single malt as most people picture it, with deep peat smoke and a sherry-cask sweetness underneath.
- Springbank 10 Year Old: Campbeltown, family-owned, floor-malted on site and allocated; if you see it at a sensible price, buy it.
Spend the money on one single malt you will drink slowly and one blend you will drink often, and ignore anyone who tells you the second bottle does not count.

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