Auchroisk 30 Years Old 1991 Cask #DL 15416 (XOP)

Bottled by Douglas Laing in 2021 as a 30 year old single cask in the Xtra Old Particular range, drawn from cask DL 15416 of 1991 vintage Auchroisk with 200 bottles distributed to the European market at cask strength of 51.2%. Xtra Old Particular is Douglas Laing's premium tier for long matured single casks of 25 years and above, sitting above the regular Old Particular line.

Distilled in 1991 at the Mulben distillery built by Justerini & Brooks in 1974, the wash was made from 100% unpeated malted barley with soft Dorie's Well water and fermented for around 53 hours in stainless steel washbacks. Auchroisk runs the spirit through four wash and four spirit stills with constricted lyne arms, encouraging high reflux that returns heavier compounds back to the pot. Shell and tube condensers give further copper contact, stripping sulphur compounds, with the spirit collected at around 70% ABV and filled into a single ex-Bourbon American oak cask.

Three decades in temperate Speyside warehousing drove patient oak extraction. Vanillin from lignin breakdown gave vanilla, cis and trans oak lactones added coconut and sweet wood, and char layer interaction produced furfural with Maillard derived caramelised sugars. Holding 51.2% across three decades indicates a moderately tight cask with steady evaporative loss, and tertiary stage ester transformation layers polished fruit over the spirit's signature light, ester forward profile.