The Secret Speyside 15-Year-Old is a single cask Speyside single malt whisky, released in 2025 by independent bottlers North Star Spirits as part of their Cask Series 26. Bottled at natural cask strength without colouring or chill filtration, this expression is believed to originate from the Benrinnes distillery.

Matured in a single Oloroso sherry hogshead, though it is unclear whether this was for the entire maturation period or as a finishing cask, the release comprises 357 bottles. It is presented at a compelling natural cask strength of 50.3%.

Age: 15 Years

ABV: 50.3%

Region: Speyside

Grain: Single Malt

Distillery: Undisclosed Speyside (‘Benrinnes’)

Cask: Oloroso sherry 

Volume: 70CL