The sherry cask has become the most requested and least understood vessel in the whisky industry. Every distillery wants sherry-matured releases. Very few of them talk honestly about the enormous variation in what "sherry cask" actually means in practice.
Here is the honest version.
What Most Distilleries Use
The demand for sherry casks from Scottish distilleries now far exceeds the supply of casks that have genuinely been used for sherry production. A significant proportion of what the industry calls "sherry casks" are STR casks — shaved, toasted and re-charred European oak that has been seasoned with sherry for a matter of months, not years. The sherry influence comes from the wood treatment, not from years of genuine sherry contact.
This is not fraudulent. It is disclosed, technically. But it produces a very different result from a cask that has held Oloroso or Pedro Ximénez for several years in a Jerez bodega. The flavour compounds that migrate from a genuinely seasoned sherry cask into whisky are different in both quantity and character from what comes out of a short-seasoned STR.
Where Ours Come From
We source all our sherry casks from a single cooperage in El Puerto de Santa María, in the Jerez region of southern Spain. The cooperage has supplied us since 2001. Our casks are ex-Oloroso — genuinely used for Oloroso sherry production for a minimum of three years before we acquire them.
We pay significantly more per cask than the industry standard. We accept that. The alternative is to produce a whisky that claims sherry influence it does not genuinely have, and that is not a trade we are willing to make.
What You Taste
The difference is in the integration. A whisky finished in a genuinely seasoned sherry cask carries the sherry influence throughout the spirit — it is woven in, not applied like a coating. You taste the dried fruit and the oxidative nuttiness at the beginning, middle and finish, not just as a top note.
Our Cooper's Reserve is finished for 24 months in these casks. What that period produces is not a sherry bomb. It is a whisky that has been in conversation with genuine Oloroso, and shows it — without losing the Highland character that was there before it entered the cask.