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10 Essential Things About Scotch Whisky Everybody Should Know

by Oliver Klimek on June 16, 2011

Are you new to whisky? Do you feel intimidated by the countless different bottles of Scotch you see on the shelves of your local whisky shop? Do you just like to drink whisky but don’t know much more about it than that it tastes good?

Here is the basic knowledge you need to find your way around in the world of Scotch whisky, divided into ten categories ranging from legal definitions over how it is made to how it is best enjoyed. And don’t forget that Scotch whisky is always spelled without an e.

1. Types

The two basic types of Scotch are malt whisky from 100% malted barley and grain whisky which can be made from any grain (usually maize or wheat) but has to include a fraction of malted barley too. Malt whisky has to be distilled in pot stills, grain whisky is usually made in column stills. There are numerous categories that have to be declared on the label:

  • Single malt whisky – malt whisky from a single distillery
  • Single grain whisky – grain whisky from a single distillery (unusual)
  • Blended malt whisky – a mixture of malt whiskies from different distilleries
  • Blended grain whisky – a mixture of grain whiskies from different distilleries (unusual)
  • Blended whisky – a mixture of malt and grain whisky, usually from different distilleries

2. Age

By law, to be allowed to be called Scotch Whisky it has to be matured in Scotland in oak casks for at least 3 years. Some very cheap whisky is just 3 years old, but most Scotch is 5 years or older. Bottled whisky may be a mixture of casks of any age over 3 years. It does not have to have an age statement, but if there is one, the age on the label must be the age of the youngest whisky in the mix in completed years. A whisky aged 3 years and 364 days is legally still 3 years old.

Some distilleries sell products younger than 3 years old. These have to be called spirit.

Single malt whisky is commonly bottled at ages from 10 to 21 years, but there are also younger and much older ages. The current record holders are bottled at an age of 70 years (from Mortlach and Glenlivet distilleries).

3. Regions

Traditionally, Scottish distilleries have been grouped into regions. The official whisky regions are

  • Lowlands
  • Highlands
  • Speyside
  • Campbeltown
  • Islay

Some prefer to regard Campbeltown as part of the Highlands but treat the Scottish islands apart from Islay as an own region.

The different whisky regions are reputed to produce their own distinctive styles of whisky. But even though there can be certain similarities, like an emphasis on peaty whisky on Islay, it is impossible to find a common denominator for each region. The region should be regarded only as a geographical hint about the location of a distillery. Actually it can safely be ignored.

4. Production of Malt Whisky

Barley is malted by soaking it in water and letting it begin to sprout. The germination is then stopped by hot air to which peat smoke may be added. Malting was traditionally done in the distilleries, but the vast majority of distilleries now uses malt from big industrial malting companies. The tradional kiln pagodas still are the visual trademark of Scottish distilleries.

The malt is then coarsely ground and mashed with hot water. This extracts the sugars from the malt. This wort is drained and fermented with yeast for at least two days, accompanied by heavy bubble action and the production of carbon dioxide. The result is the wash which has an alcohol content of about 7%.

Distillation is done in copper pot stills. Because this ancient method is not very efficient, this has to be done at least twice. Most distilleries use double distillation, but some distill three times. The final spirit usually has a strength of about 70%

5. Maturation

Scotch whisky must be matured in oak casks which are usually recyled. Most casks have previously held American bourbon, but also sherry casks from Spain are common. Only a very small fraction of Scotch is matured in all new casks. To a lesser extent other cask types like port, madeira, rum or wine are used as well.  The process of re-filling whisky into a fresh cask for the final months of the maturation is called finishing. Most whisky casks are re-used several times by distilleries.

Maturation takes place in warehouses. The traditional dunnage warehouses have stone walls and an earth floor which is believed to create perfect conditions for maturation. But there are also modern racked warehouses with concrete floor and steel walls where casks can be handled by forklifts.

During maturation, the clear new spirit extracts flavouring and colouring substances from the cask that are both from the wood and the remains of the previous cask filling. The longer it stays in the cask, the darker the whisky gets. But every cask is different. There are 5 year old whiskies that are dark brown, and there are 30 year old whiskies that are only slightly yellow.

Because the casks are not totally airtight some of the spirit evaporates during maturation. This is called the angels’ share, depending on the climate and the location of the cask in the warehouse this loss is typically betwteen 1% and 2% per year.

6. Blending and Vatting

Most whisky you find in shops is a mixture of several casks. This is obvious for blends, but also single malt whisky is usually not bottled from single casks. The process of mixing the a batch of casks selected for bottling is called vatting because prior to bottling the caks are filled into huge vats where they are “married” for a while.

All blended whisky brands like Johnnie Walker or Chivas Regal have their own recipes for their whiskies. It is the job of of the master blender to select the right casks in order to make sure each vatting tastes the same. The process is basically the same for single malt bottlings with the difference that only casks from a single distillery are selected.

7. Bottling

For bottling most whisky is diluted with water to a lower alcoholic strength. The legal minimum is 40%, and many brands adhere to this standard, but there are also bottlings at 43%, 46%, 48% or even 50%.

Whisky contains fatty components that are dissolved at casks strength, but when diluted below 46% they can turn it cloudy. This is why many whisky producers apply chill-filtration to remove them. The whisky is cooled down just above freezing and then run through a fine filter that holds back the fatty substances. Especially big whisky brands also add caramel colouring (E150a) to the whisky to ensure that each bottled batch has the same colour. The possible impact of caramel colouring and chill-filtration is a subject of sometimes heated debate among whisky lovers.

Some whisky is bottled undiluted at natural cask strength, and there are also bottlings of single casks.

8. Business

Even though single malt is usually regarded as the most sophisticated type of Scotch whisky, about 90% of Scotch is sold as blended whisky. The Scotch whisky business is dominated by big conglomerates like Diageo (Johnnie Walker, Bell’s) or Pernod Ricard (Chivas Regal, Ballantine’s). These do not only mix their blends, they also own the distilleries that produce the raw whiskies. Only a fraction of the distilleries are independent companies.

Currently there are about 100 malt distilleries in Scotland and a handful of industrial scale grain whisky distilleries.

There is also a market for full whisky casks which allows independent bottlers to sell whisky of various distilleries under their own label. Some distillieries have disallowed independent bottlers to use their name for their bottlings, so you will also find whiskies with fantasy names on the shelves whose provenance can only be guessed. Other distilleries have no orignial bottlings of their own because they almost exclusively produce for blends, so you have to rely on independent bottlers to enjoy them as single malts.

9. Flavours

Scotch single malt whisky comes in a seemingly infinite variation of flavours. You will find heavily peated and smoky single malts like Laphroaig that may even shock you, if you haven’t tasted them before, creamy and fruity whiskies like Glenlivet but also the heavy sherry cask matured Macallan or Glenfarclas malts. Sometimes even two whiskies from a single distillery can be totally different.

The scope of flavours in blended whisky is more limited because blenders try to create a flavour profile that will appeal to as many people as possible. In younger blends the grain whisky creates a certain roughness which will mellow down at higher ages.

As mentioned above it is often tried to group Scotch whisky flavours by regions, but there is no general trend at all. You just have to try as many different whiskies as possible to find out your favourites.

10. Enjoying your Scotch

How to enjoy Scotch whisky in the best possible manner has always been a matter of controversy. Some drink it neat, some add water, some add ice, and others use it with mixers.

If you just go for the refreshment, either way is fine. But there is a consensus that if you wish to fully explore the nuances of flavour, a tulip shaped nosing glass and whisky at room temperature work best. Fill the glass with 20 to 30 ml (or about an ounce), swirl it around a little and enjoy the smell. Then take a sip and hold it in your mouth for a few seconds before swallowing, so the flavours can reach every part of your palate. Adding a few drops of still spring water helps to “open up” a whisky because the water breaks up the connection between the alcohol and the flavour molecules. You may notice that smell and taste of your dram change a little after a few minutes. This is perfectly normal and does not mean that your senses are playing tricks on you.

But whichever way you prefer to your dram: Scotch whisky is best enjoyed in company.

Tired of all the theory? Let’s start dramming:

10 Essential Scotch Whiskies Everybody Should Have Tried

{ 6 comments… read them below or add one }

Bennie Dijkslag June 24, 2011 at 11:33 am


I was really curious for this post, since I popped over here from your post on professional whisky writing and I must say it’s one of the best, clear and complete writings i’ve found on Scotch whisky. And even not *that* much of text to go through. Well done, indeed !!


I have some comments, do with them what you want:

1. Types

Single grain & blended grain have the addition (Unusual), by which I think you mean it’s rarely sold in that state. Because single grain, for instance, is hardly to be called “unusual”. If talking about creating a clear definition, I would rephrase that comment.

4. Production of Malt Whisky

“…is drained and fermented with yeast for at least to days,” – I think you forgot a “w” in the “two”.

5. Maturation

“.. some of the whisky evaporates” – to be a complete purist I would not use the word whisky here, since the first 3 years it’s not officially whisky, maybe liquid is a better word.

10. Enjoying your Scotch

I’m missing something here that I miss in a lot of text in this area. One tends to skip quickly over the smelling and discuss the tasting in more detail (hold it in your mouth, add water). But even with smelling there can be given tips:
– Smell first with your glass a little bit away from your nose (hold it 5 – 10 cm under your nose) – the lighter aromas come up (fruits ??)
– Tilt the nose from your left nostral to your right (or the other way around), since your nose is not working the same at both sides.

And then a question from my side, you might have some knowledge on: do you dip your nose completely into the glass, closing it of with your nose & face or do you keep your nose just above the edge or….. ??

All in all, I really enjoyed reading this text and will point people definitely to here to get the simple basics on Scotch Whisky!



Oliver Klimek June 24, 2011 at 11:51 am

Thanks for your comments, Bennie. I corrected the typo (you can proofread five times and still not find everything…) and replaced “whisky” by “spirit” in #5.

Regarding the types, I describe those declared on the bottle label according to the SWA regulations. And here indeed the single and blended grains are unusual as probably 99.9%+ of grain whisky goes into blends.

Of course you can widen the nosing and tasting part, but I wanted to keep it as short as possible. The smell of most whiskies is strong enough that you don’t need to dip your nose into the glass. I only do that with bland stuff to get at least a minimum of aroma 😉


James Buchanan (for real) November 8, 2013 at 8:10 pm

Thanks for the write up, cleared a few questions this new Scotch drinker had.
What is your opinion on Blended vs Single malt? For some reason when drinking my name :D, the taste is just off, could this be because I started and accustomed myself to SM?

What was the original reasoning behind Blended, to avoid waste, or get a full spectrum? This is the main question I was searching for…not many aficionados opinions I could find sadly.
Thank You.



Oliver Klimek November 11, 2013 at 10:33 am

Belending malt with cheap grain whisky allowed the industry to produce large quantities of whisky with consistent results.


Imanuel Ganaseb December 18, 2015 at 5:26 am

I really enjoyed reading your article on scotch whiskey as much as i enjoy drinking the whiskey thank u very much for the product im thing that iam not the only Namibian that enjoys this fine whiskey thank u.


Gaurav Jayaswal April 10, 2016 at 1:53 am

Very nicely written indeed. I have a question though. What does age (10 years , 12 years etc) really mean? Is to the number of years for maturation?


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