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Guide to Whisky

What is whisky?

Whisky, also spelt whiskey, is a distilled spirit crafted from fermented grain mash. The spelling distinction often reflects regional variations: “whisky” is commonly used in Scotland, Canada, and Japan, while “whiskey” is a more general term which includes Ireland and the United States. Regardless of the spelling, the essence remains the same: a spirit made from grains like barley, corn, rye, and wheat, transformed through malting, mashing, fermentation, distillation and maturation into a diverse range of flavours and styles.

Where does the word whisky come from?

The word “whisky” originates from the old Scottish Gaelic term “uisge beatha,” meaning “water of life.” This Gaelic term was a direct translation of the Latin “aqua vitae,” used to describe distilled spirits. Over time, “uisge beatha” was shortened and transformed through pronunciation into “usky” and eventually “whisky.”

How many whisky regions are there in Scotland?

There are five Scotch whisky regions in Scotland, each region has its own distinct style and flavour profile, influenced by local traditions, climate, and water sources.

The whisky regions are:

Campbeltown

The Highlands

Produces a diverse range of styles, from light and floral to rich and smoky

Islay

Famous for producing heavily peated, smoky whiskies

The Lowlands

Speyside

Known for its fruity, floral, and sometimes spicy whiskies

What are the different types of whisky?

What is Scotch whisky?

Produced in Scotland, Scotch is typically made from malted barley and must adhere to strict production regulations. It must be made from malted barley and other whole cereals if required, water and yeast and be distilled and matured in Scotland in oak casks for at least three years and bottled at a minimum alcoholic strength of 40% abv. Single Malt Scotch must be made from 100% malted barley.

What is Irish whiskey?

Produced in Ireland and typically sold as blended whiskey although can also be sold as grain whiskey, single malt and pot still whiskey. Pot still whiskey uses a mix of malted and un-malted barley. All Irish Whiskey must be matured in hardwood casks (such as oak) for a minimum of three years.

What is Bourbon whiskey?

Produced in the US, bourbon is made from 51% corn and a mix of other grains that form the ‘mash bill’. All bourbon must be aged in new charred oak barrels however there is no legal minimum age except where referred to as straight bourbon which must be a minimum of 2 years old.

What is Canadian whiskey?

Produced in Canada from a variety of grains, commonly corn and rye, this spirit must be mashed, distilled and aged for a minimum of three years.

What is the difference between Blended Scotch Whisky and Single Malt Scotch Whisky?

Single Malt

Made from malted barley from a single distillery, showcasing a unique character.

Blended Whisky

A blend of malt and grain whiskies from different distilleries, offering a balanced and consistent flavour profile.

Blended Malt

A blend of single malt whiskies made from 100% malted barley.

What is the difference between bourbon and whisky?

Bourbon is a type of whiskey, but the main difference is that bourbon is made from at least 51% corn, while whiskey can be made from a variety of grains. Legally Bourbon has to be made and produced in the US whilst Scotch Whisky must be made and produced in Scotland.

How is whisky made: The whisky production process

Stage 1: Malting

Barley grains are soaked and allowed to germinate, activating enzymes that convert starches to sugars before being dried in kilns.

Stage 2: Mashing

The malted barley is ground and mixed with hot water, extracting the sugars to create a sweet liquid called wort.

Stage 3: Fermentation

Yeast is added to the wort, converting sugars into alcohol, producing a “wash” or “distillers beer.”

Stage 4: Distillation

The wash is heated in copper pot stills, leading to the separation of alcohol from water and other components. This process is repeated in the copper spirit still where the spirit is crafted, enhancing its flavour.

Stage 5: Maturation

The new-make spirit is filled into oak casks for aging, where it develops its colour, aroma, and complex flavours over time. After three years, it can legally be called Scotch Whisky.

How long is whisky aged?

The length of time a whisky is aged depends on the type of whisky and the region or country it is produced in.

Scotch whisky

Must be aged in oak casks for a minimum of three years but can be aged for much longer. If there is an age statement on a bottle of Scotch Whisky i.e. 12 Years Old, this means that the youngest whisky in the bottle has been matured in warehouses for at least 12 years.

Bourbon whiskey

Aged in new oak barrels, bourbon is usually bottled at a younger age than Scotch whisky. Bourbon has no minimum specified duration for its aging period. The exception is straight bourbon, which has a minimum aging requirement of two years. In addition, any bourbon aged less than four years must include an age statement on its label.

Japanese whiskey

Must be aged in oak for a minimum of three years.

Irish whiskey

Must be aged in wooden casks for a minimum of three years.

Canadian whiskey

Must be aged in oak for a minimum of three years.

Is whisky a spirit?

A spirit is an alcoholic beverage that has a minimum alcohol strength of 15% alcohol by volume (ABV).  Spirits are produced by distilling fermented grains, fruits, or vegetables, which concentrates the alcohol content. This process results in beverages with higher ABV percentages, ranging from around 40% to over 70%.

What is peated whisky?

Peat is a soil-like material formed over millennia from decomposed organic matter. Centuries ago, peat fuelled the copper pot stills and dried the barley during the malting process.

Drying malted barley requires a delicate balance of heat: high enough to remove moisture, yet low enough to avoid scorching. Traditionally, a long, slow peat fire provided this gentle heat, allowing the smoke to infuse the barley and impart a unique flavour that carried through to the final distilled spirit.

Today, while the drying process typically relies on alternative heat sources, peat fires are often used secondarily to preserve the smoky character of a whisky.

Peated whisky comes from Scotland, with most peated whiskies originating from Islay or the Islands, with some Highland varieties. The length and intensity of exposure to the peat smoke, as well as the type of peat used, determine the strength of the smoky flavour.

How long does whisky last once open?

Whilst the flavours of the whisky may change slightly, whisky doesn’t go off once open. Once new air reacts with the liquid in the bottle, it begins to oxidise the whisky. However, this doesn’t mean the flavour will be hindered straightaway. Over time, the whisky may lose its original flavour and colour, but this is a slow process.

However, a whisky can last for several years after opening it, depending on how it is stored. Tips for correct storage include:

  • Reseal the bottle after opening it
  • Avoid large temperature swings
  • Keep out of direct sunlight
  • Store in a cool, dark place

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