WhiskeyFYI

Distilling Basics

Column Still

A continuous distillation apparatus, also called a Coffey still or patent still, that processes wash in a continuous stream rather …

Distillation

The process of heating a fermented liquid to separate alcohol from water based on differing boiling points. Whiskey is typically …

Feints

The final fraction of a distillation run, also called tails, containing heavier alcohols and oily compounds. Feints are typically recycled …

Fermentation

The biological process where yeast converts sugars in the wort into alcohol and carbon dioxide, typically lasting 48 to 96 …

Foreshots

The first fraction of distillate collected during a spirit run, containing volatile compounds like methanol and acetone that are toxic …

Hearts

The middle fraction of a distillation run, selected by the stillman for its optimal balance of flavor, purity, and alcohol …

Mashing

The process of mixing milled grain with hot water in a mash tun to convert starches into fermentable sugars. Temperature …

New Make Spirit

The clear, unaged distillate that comes off the still before being placed into casks for maturation. New make spirit is …

Pot Still

A traditional copper batch distillation vessel shaped like an onion or pear. Pot stills produce spirit in individual batches, retaining …

Wash

The fermented liquid produced after yeast converts sugars in the wort, typically containing 7-10% alcohol by volume. The wash is …

Maturation & Casks

Angel's Share

The portion of whiskey that evaporates from the cask during maturation, typically 1-2% per year in Scotland and up to …

Cask Finish

The practice of transferring mature whiskey to a different type of cask for a secondary period of aging. Common finishes …

Cask Strength

Whiskey bottled directly from the cask without dilution, typically ranging from 50% to 65% ABV depending on aging conditions. Cask …

Charring

The process of setting the inside of a new oak barrel on fire for a controlled duration, creating a layer …

First Fill

A cask being used for the first time to mature whiskey after its initial purpose (such as holding bourbon or …

Oxidation

The slow chemical reaction between whiskey and oxygen entering through the cask's pores during maturation. Controlled oxidation mellows harsh alcohol …

Refill Cask

A cask that has already been used to mature whiskey at least once before. Each subsequent fill extracts less flavor …

Toasting

A gentler heat treatment of oak cask staves using radiant heat rather than open flame. Toasting caramelizes wood sugars at …

Vatting

The process of combining whiskey from multiple casks to create a consistent flavor profile, also called marrying. In blended malt …

Warehouse Type

The style of aging warehouse used, which significantly affects maturation. Dunnage warehouses have earthen floors and stone walls with stable …

Tasting & Nosing

Dram

A traditional Scottish term for a measure of whisky, used colloquially to mean any glass or pour. Historically a dram …

Finish

The lingering taste and sensation after swallowing whiskey, measured both in duration (short, medium, long) and character (dry, sweet, warming, …

Legs

The streaks of liquid that form on the inside of a whiskey glass after swirling, also called tears or curtains. …

Mouthfeel

The tactile sensation of whiskey in the mouth, describing its weight, texture, and viscosity. Terms like oily, creamy, waxy, thin, …

Neat

Whiskey served at room temperature without water, ice, or any mixer. Drinking neat allows full appreciation of the spirit's natural …

Nosing

The practice of smelling whiskey to identify aromatic compounds before tasting. Proper nosing involves holding the glass at chest level, …

Peat

Decomposed plant matter found in boggy areas, burned as fuel during the malt kilning process to impart smoky, earthy, medicinal, …

Phenols

Chemical compounds absorbed by barley during peat-smoke kilning that produce the characteristic smoky, medicinal flavors in peated whiskey. Measured in …

Proof

A measurement of alcohol content in spirits. In the United States, proof equals twice the ABV percentage (so 80 proof …

Tasting Notes

Written descriptions of a whiskey's aroma, flavor, and finish, used to communicate the sensory experience. Professional notes typically follow a …

Scotch Whisky

Age Statement

The number on a whisky bottle indicating the youngest spirit in the blend, expressed in years. By law, the age …

Blended Scotch

A whisky created by combining single malt whiskies from multiple distilleries with grain whisky for consistency and balance. Blended Scotch …

Cask Number

A unique identifier assigned to each cask at the time of filling, used for traceability and single cask bottling. Single …

Highland

The largest Scotch whisky region by geography, spanning from the central lowlands to the northern coast. Highland malts vary enormously …

Independent Bottler

A company that purchases casks of whisky from distilleries and bottles them under its own label, often as single cask …

Islay

A Scottish island off the west coast known for intensely peated, smoky whiskies. The island's nine distilleries, including Laphroaig, Ardbeg, …

NAS

No Age Statement: a whisky released without declaring the minimum age of its components. NAS bottlings give distillers flexibility to …

Scotch Whisky Act

The Scotch Whisky Regulations 2009, UK legislation defining what may legally be called Scotch whisky. Requirements include distillation in Scotland, …

Single Malt

Scotch whisky distilled entirely from malted barley at a single distillery using pot stills. The term 'single' refers to one …

Speyside

Scotland's most densely populated whisky region, centered around the River Spey in the Highlands. Home to over 50 distilleries including …

American Whiskey

Bottled in Bond

A designation under the Bottled-in-Bond Act of 1897 requiring whiskey to be the product of one distiller, one distillery, one …

Bourbon

An American whiskey made from a mash bill of at least 51% corn, distilled to no more than 160 proof, …

Mash Bill

The recipe of grains used to produce a whiskey, expressed as a percentage of each grain type. Bourbon mash bills …

Rickhouse

A multi-story barrel aging warehouse used primarily in bourbon production, with wooden ricks stacking barrels up to nine tiers high. …

Rye Whiskey

An American whiskey made from a mash bill of at least 51% rye grain. Rye whiskey is known for its …

Single Barrel

Whiskey bottled from one individual barrel rather than blended from multiple barrels. Each single barrel bottling is unique, offering variation …

Small Batch

A marketing term indicating whiskey blended from a limited number of barrels, though no legal definition specifies the maximum count. …

Sour Mash

A process where a portion of previously fermented mash (backset or setback) is added to a new batch to regulate …

Tennessee Whiskey

Whiskey produced in Tennessee that undergoes the Lincoln County Process: filtering new make spirit through a bed of sugar maple …

White Dog

A colloquial American term for unaged corn whiskey or new make spirit straight off the still. Some distilleries bottle and …

Irish & Japanese

Blended Malt

A whisky created by blending single malts from two or more distilleries, without adding grain whisky. In Japan, this practice …

Bonded Warehouse (Irish)

A government-supervised warehouse where Irish whiskey must age for at least three years in wooden casks on the island of …

Grain Whiskey (Irish)

Irish whiskey produced in a column still from a mash of corn or wheat with a small percentage of malted …

Highball

A simple cocktail of whisky and soda water served over ice, traditionally in a tall glass. The highball is a …

Japanese Whisky Standards

Voluntary standards introduced in 2021 by the Japan Spirits & Liqueurs Makers Association requiring Japanese whisky to be fermented, distilled, …

Mizunara Oak

Japanese oak (Quercus mongolica var. crispula) used for cask maturation, prized for imparting unique sandalwood, incense, and coconut notes. Mizunara …

Peated Irish

A style of Irish whiskey where the barley is dried over peat fires, borrowing from Scottish tradition. Though historically uncommon …

Pot Still Whiskey

A distinctly Irish style made from a mix of malted and unmalted barley in a pot still. Single pot still …

Toji

The head distiller at a Japanese whisky distillery, responsible for all aspects of production from mashing to distillation. The toji …

Triple Distillation

A distillation process using three separate pot still runs rather than the more common two. Triple distillation, traditional in Irish …

Production

Condenser

The apparatus that cools alcohol vapors back into liquid form after distillation. Shell-and-tube condensers produce a cleaner spirit, while traditional …

Copper Contact

The interaction between spirit vapors and copper surfaces in the still, which strips undesirable sulfur compounds from the distillate. Greater …

Floor Malting

The traditional method of malting barley by spreading it on a stone floor and manually turning it with shovels during …

Lyne Arm

The pipe connecting the head of a pot still to the condenser, also called the lye pipe. The angle of …

Malting

The process of soaking barley in water, allowing it to germinate, then drying it in a kiln to halt growth. …

Milling

Crushing malted barley through a roller mill to produce grist, a mix of flour, grits, and husks. The grist ratio …

Spirit Safe

A brass-and-glass cabinet through which newly distilled spirit flows, allowing the stillman to visually assess and redirect the distillate into …

Washback

The vessel in which fermentation takes place, traditionally made from Oregon pine or larch wood, though stainless steel is increasingly …

Worm Tub

A traditional coiled copper pipe submerged in a tub of cold water, used to condense spirit vapors. The reduced copper …

Wort

The sweet, sugary liquid drained from the mash tun after hot water has extracted fermentable sugars from the grist. Clear …

Legal & Classification

ABV

Alcohol By Volume, the standard international measure of alcohol content expressed as a percentage. Most whiskey is bottled between 40% …

Blended Whiskey (US)

In the United States, a blend of at least 20% straight whiskey with neutral grain spirits or other whiskey. Not …

Chill Filtration

A process of cooling whiskey to near-freezing temperatures and passing it through fine filters to remove fatty acids and proteins …

Craft Whiskey

A loosely defined term for whiskey produced by small, independent distilleries, typically emphasizing artisanal methods, local ingredients, and hands-on production. …

E150a

Spirit caramel, a food coloring additive permitted in Scotch whisky and many other whiskies to ensure batch-to-batch color consistency. While …

Geographic Indication

A legal designation that protects the name of a product originating from a specific region. Scotch whisky, Irish whiskey, bourbon, …

Natural Color

A label claim indicating no artificial coloring (E150a) has been added to the whiskey. The color comes solely from interaction …

Non-Age Statement

A whiskey release that does not declare the minimum age of its components on the label. NAS whiskies have grown …

Straight Whiskey

An American whiskey designation requiring a minimum of two years aging in new charred oak containers with no added coloring …

Vintage

A whiskey bottled from a single year of distillation, with the distillation year stated on the label. Vintage releases are …

Collecting & Investment

Auction Record

The highest price achieved for a bottle of whiskey at public auction. Rare Scotch whiskies, particularly from closed distilleries, dominate …

Bottle Condition

The physical state of a collectible whiskey bottle, including fill level, label integrity, capsule condition, and overall presentation. Condition significantly …

Cask Investment

Purchasing a full cask of maturing whiskey as an investment, with the intention of bottling or reselling after further aging. …

Closed Distillery

A distillery that has permanently ceased production, making its remaining whiskey increasingly rare and valuable over time. Famous closed distilleries …

Fill Level

The amount of liquid remaining in a sealed whiskey bottle, which can decrease over decades through evaporation via the cork. …

Limited Edition

A whiskey release produced in restricted quantities, often from a single cask or small batch, and typically not repeated. Limited …

Outturn

The total number of bottles produced from a specific cask or limited release, typically printed on the label or bottle …

Provenance

The documented history and ownership chain of a whiskey bottle, establishing its authenticity and storage conditions. Provenance is critical for …

Single Cask

A whiskey bottled from one individual cask without blending with spirit from any other cask. Each single cask release is …

Whiskey Investment

The practice of purchasing whiskey bottles or casks as financial assets, expecting their value to appreciate over time. While returns …

Whiskey Glossary