Some people take their first sip of a heavily peated whisky and immediately fall in love. Others wonder why anyone would willingly drink something that reminds them of a campfire.
Peat is partially decomposed plant matter that has accumulated over thousands of years in waterlogged bogs. In parts of Scotland, particularly on Islay, it was traditionally used as fuel when drying malted barley during the malting process. As the peat burns, smoke passes through the barley and deposits flavor compounds that eventually find their way into the finished whisky.
Most people describe peated whisky as smoky, but smoke is only the beginning.
Why two peated whiskies can taste so different
Depending on where the peat comes from, the flavors can range from earthy and medicinal to floral, herbal, maritime, or even slightly sweet. Peat harvested from different regions contains different plant materials, and those differences can influence the character of the smoke.
A heavily peated Islay whisky might remind you of sea spray, iodine, and a beach bonfire. Another peated whisky might lean more toward wood smoke, damp earth, or toasted herbs. Even whiskies with similar peat levels can deliver dramatically different experiences because distillation, maturation, and cask selection all shape the final result.
The PPM question
That brings us to one of whisky's favorite numbers: PPM.
PPM, or parts per million, is often used to measure peat levels in malted barley. Many whisky drinkers assume a higher PPM automatically means a smokier whisky. In reality, it is not that simple. Smoke compounds are lost throughout production, and the choices made by the distiller can dramatically affect how much peat character survives into the bottle.
Two whiskies with similar PPM numbers may taste very different. The number is a starting point, not a verdict.
How peat changes with age
One of the biggest surprises for new whisky drinkers is how peat evolves over time.
Young peated whiskies often deliver bold smoke right up front. Over time, that smoke can soften and integrate with the spirit, creating more complex flavors that may include leather, spice, tobacco, and rich earthy notes. The peat does not disappear. It simply evolves.
At Bellaire & Day, we love peat not because it makes a whisky smoky, but because it gives a whisky personality. We hope to have our first peated release in the near future, and we cannot wait to share it.
Whether it is a gentle whisper of smoke in the background or a full-on coastal bonfire in a glass, peat adds another layer to the conversation. It challenges expectations. It creates memorable drams. And perhaps most importantly, it reminds us that whisky is never just one flavor.
So the next time someone tells you a whisky is peated, do not ask how smoky it is.
Ask what kind of smoke.