How Whisky Is Made: A Beginner’s Guide

Whisky production begins with selecting grains, water, and yeast, which form the foundation of flavor and character.

Key Insight: Grain choice has the biggest impact on a whisky’s base flavor before distillation or ageing begins.

Bourbon: At least 51% corn, creating a sweet, full-bodied base.

Scotch: Primarily malted barley; peat may be used for smoky notes.

Japanese: Malted barley with a strong focus on water purity and balance.

Australian: Flexible grain choices, often emphasizing local and experimental inputs.

Mashing mixes ground grain with hot water to convert starches into fermentable sugars.

Why It Matters: Efficient mashing determines how much alcohol can be produced and influences mouthfeel.

Bourbon: Cooked mash, often using the sour mash method.

Scotch: Infusion mashing with multiple water extractions.

Japanese: Similar to Scotch, with precise temperature control.

Australian: Combines traditional and craft brewing techniques.

During fermentation, yeast converts sugars into alcohol while creating flavor compounds.

Flavour Builder: Many fruity, floral, and spicy notes are created during fermentation—not distillation.

Bourbon: Shorter fermentations that produce bold, robust flavors.

Scotch: Longer fermentations, resulting in fruity and complex notes.

Japanese: Carefully managed fermentations for smoothness and balance.

Australian: Warm climate often accelerates fermentation; experimental yeasts are common.

Distillation heats the fermented liquid to separate and concentrate alcohol and flavor.

Still Shape Matters: The size and shape of a still directly influence the weight and texture of the spirit.

Bourbon: Typically distilled in column stills, often with a doubler.

Scotch: Copper pot stills, usually double distilled.

Japanese: A variety of pot still shapes to create diverse spirit styles.

Australian: Both pot and column stills, often in small batches.

Ageing allows whisky to mature in wooden barrels, developing color, aroma, and depth.

Most Flavor Comes From Ageing: Up to 70% of a whisky’s final flavor can come from the barrel.

Bourbon: Aged in new, charred American oak barrels for rich vanilla and caramel notes.

Scotch: Matured in used oak barrels, leading to slower, subtler flavour development. Minimum 3 Years

Japanese: Uses varied wooden casks, including Mizunara oak, to enhance complexity. Minimum 3 Years

Australian: Hot climates accelerate aging, producing intense, wood-driven flavors. Minimum 2 Years

Before release, whisky may be filtered, diluted, and bottled to its final strength.

Final Touch: Bottling decisions affect clarity, texture, and perceived smoothness.

Bourbon: Often bottled at higher strengths with chill filtration. Minimum 40% ABV

Scotch: Bottled at regulated strengths; sometimes non-chill filtered. Minimum 40% ABV

Japanese: Emphasis on balance and approachability. Minimum 40% ABV

Australian: Frequently bottled at cask strength with minimal processing. Minimum 37.5% ABV