The strength of a fad

Definition

Cask strength refers to whisky bottled without dilution at bottling time, and thus at the alcohol strength the whisky had in the cask. In English it is often referred to as 'cask strength'.

Typical ABV ranges

Typical cask strengths lie around 50-65% ABV, but higher or lower figures can occur depending on the distillery, type of cask, and maturation. It is often suited for those who want a variant closer to the contribution from the wood and the cask.

Flavor and aroma characteristics

At higher ABV you gain intense alcohol warmth and stronger fruit aromas and the tannins of the wood. Aged cask notes (vanilla, spices, toffee) can be more dominant with undiluted bottling; however, results vary significantly between different releases.

Water addition and enjoyment

Many beginners prefer to add water to the glass to open up aromas and soften the heat. A practical approach is to start with a few drops of water per 25 ml of whisky and adjust to taste. The water tones down the heat of the alcohol and can enhance wood notes and sweetness.

Labeling and variation

Whiskies bottled at cask strength may be labeled 'Cask Strength' or 'Navy Strength'. Some variants are referred to as 'Navy Strength', meaning an alcohol strength around or above 57% ABV. Such variants often require more cautious enjoyment and longer time in the glass.

Notes on aging

Cask strength is influenced by the cask's size and age, the wood type, and the temperature and humidity of the storage environment. After bottling, the balance changes when mixed with water or ice.