Whisky is made by the distilling of grains that are aged as a result of alcohol being stored in oak casks. The complex world of whisky is made up of distillation processes, flavors and grains. There are four countries that produce very different whiskies: Ireland, America, Scotland and Canada, although it is made all over the world.
Whisky is made from grain, water and yeast. It is very similar to other grain alcohols in that it may use a variety of different grains to be made. Common grains include wheat, barley, corn and rye. It is sometimes called the ‘juice of the barley’, a reference associating the grain used with the type of whisky created. The water used to make whisky is thought to be the most important part in making good whisky. The water should be clear, clean and also free from any impurities that might make it taste bad. Water from Scotland is famous for being able to produce fine whisky and the reasons for this are still unknown.
The maturation process of whisky is not done in a bottle, only in a cask. The age of the whisky is the amount of time between the distillation and the bottling. This shows how much the whisky and cask have interacted, changing both its taste and chemical makeup. Whisky that has been stored in a bottle for a long time has a great value, but is not considered ‘older’ and will not necessarily be ‘better’ than whisky that has been made and matured in wood for the same amount of time.
A whisky maker always has a supply of yeast on hand that has been grown on barley malt and has also been kept away from bacterial contamination. Some makers use many kinds of yeast to regulate the fermentation process accurately. The particular type of grain used will depend on what kind of whisky is made, but all whiskey does have a small portion of malted barley in them. This is needed to begin the fermentation process.
The steps of distillation of whisky have adjusted some in the last 200 years. There are still the three ingredients: barley, water and yeast, but technology now helps in the production. There are traditionally five steps int the process: malting, mashing, fermentation, distillation and maturation.
Malting
The starch found in barley needs to be changed into sugars to make the alcohol. To start this, the barley has to be germinated, which is called ‘malting’. The barley is soaked for days and laid out on the floor and turned regularly to keep its temperature. Once the barley begins to shoot, it is dried in a kiln. This is now called malted and ground in a mill removing any debris.
Mashing
Hot water is now mixed into the malt. This mixture is called ‘grist’ and put into a mash tun and mixed for many hours. The sugar in the malt will dissolve and drain through the bottom of the tun; this liquid is called ‘wort’. These steps are done three times with the amount of water increased every time.
Fermentation
The wort is then cooled and put into big tanks called washbacks. This is when the yeast is added and the fermentation begins. The yeast takes the sugars present and turns it into alcohol. After two days, the fermentation is stopped. The liquid at this point is called ‘wash’ and is at a low strength like ale or beer.
Distillation
Here the wash is put into the wash still and heated. The liquid will vaporize and rise to the neck where it condenses. This liquid is called ‘low wines’ and passed on to the second still called the ‘spirit still’. From the spirit still, the alcohol that is produced is divided into three groups: that of high alcohol level, that of weak alcohol level and that in the middle. The alcohol that is in the middle group is the only one that is used. This is taken to be matured into whisky.
Maturation
The spirit is taken and placed into oak casks and then stored. It is kept here for a minimum of three years before it can be called whisky legally. During this time of maturation, the flavours mix with the compounds in the cask and creates a unique aroma and flavor. Each year that passed, around 2% of spirit is lost from natural evaporation.