There is something quietly compelling about the American single malt movement. It lacks the centuries of codified tradition that Scottish distillers lean on, and perhaps that is precisely what makes bottles like this Copperworks Cask 356 worth paying attention to. This is a single cask expression, bottled at a muscular 59.5% ABV and released as an exclusive to The Whisky Exchange — the kind of allocation that tends to disappear before most drinkers have heard of it.
Copperworks has been building a reputation among those who follow the American craft scene closely. Based in Seattle, Washington, they work with malted barley and pot stills — a deliberate nod to Old World methodology applied with New World freedom. That willingness to bridge tradition and experimentation is what draws me to producers like this. They are not trying to replicate Scotch. They are asking what single malt can become when you strip away two hundred years of assumption.
What to Expect
At 59.5%, this is not a whisky that will meet you halfway. Cask strength releases demand a certain respect — you are getting the spirit as the distiller intended, without the softening hand of dilution. For a single cask bottling, that strength suggests a confident wood interaction. The fact that this carries no age statement is worth noting but not, in my view, a mark against it. NAS releases live or die on the quality of cask selection, and a single cask exclusive suggests The Whisky Exchange tasted widely before committing to Cask 356.
American single malts at this strength tend to carry a weight and sweetness that their Scottish cousins handle differently. Expect the malt backbone to be prominent — this is, after all, a malted barley spirit — but filtered through whatever character the Pacific Northwest climate has imposed on maturation. Warmer warehouse conditions generally accelerate the conversation between spirit and oak, which can produce bold, demonstrative flavours even in younger whisky.
The Verdict
I rate Copperworks Cask 356 at 7.9 out of 10. This is a genuinely interesting whisky. It represents the sharp end of American craft distilling — single cask, cask strength, no age statement to hide behind. At £89.95, you are paying a premium over many entry-level Scotch single malts, but you are also buying something with genuine scarcity and character. This is not a mass-produced product. It is one cask, selected for a specific retailer, and once it is gone there will be no identical replacement.
What holds it just short of the highest marks is the uncertainty that comes with any emerging category. American single malt does not yet have the Protected Geographical Indication or the decades of benchmarking that allow you to place a Speyside or an Islay with confidence. That is not a criticism of this whisky — it is a reflection of where the category sits. Copperworks are doing the work to change that, and bottles like Cask 356 are the evidence.
Best Served
Pour this neat and give it ten minutes in the glass. At 59.5%, a few drops of water are not just acceptable — they are recommended. Add water gradually, a few drops at a time, and see how the spirit opens. This is a whisky that rewards patience. I would avoid ice entirely; at this strength and price point, you want to taste what the cask has given you, not mask it. A Glencairn glass is ideal, though any tulip-shaped nosing glass will serve.
