In speaking to whisky lovers (most happen to be men, but do accept me in their brethren as a fellow enthusiast, writer, and educator), I’ve learned a great many opinions on how to drink whisky. Specifically, preferences on adding water and ice vary greatly.
A brand ambassador that I had the privilege of listening to recently said the obvious: both dilution and temperature change when you add ice, so if you are going to add something, a little water is best. I personally prefer to use a water dropper, so I can add one drop at a time until I get to the desired taste. Here are the differences:
Rocks: Provides the highest rate of dilution as a lot of ice melts quickly. If you are drinking a barrel proof whisky, it kind of defeats the purpose as the distiller didn’t add water as they do in every other type of finished whisky.
On the Rock: The single rock, cube, or sphere is the slowest to melt and thought to be the most aesthetic. It’s nice if you want to stretch out your tasting. I often order on the rock if I want my drink to last longer.
Neat: This is the way single malt Scotch is served at a tasting event, in a branded Glencairn or Neat glass so that proper nosing for aromas can be achieved - and a dram of Scotch, smaller than an ounce, fits in them perfectly.
Water: As I mentioned above, quoting the brand ambassador, a little water is better for a fine whisky over any kind of ice. Often, if ordered with water the water is served in a separate vessel on the side so you can add in as much as you want.
Quoting another expert on the subject, Richard Paterson of The Dalmore famously and enthusiastically demonstrates in his Scotch classes how to drink single malt Scotch whisky: Paterson fills a lowball glass to the rim with ice, adds Scotch and then ceremoniously throws it over his shoulder onto the carpet of the classroom – because that much ice makes the drink worthless. One more quote, never “add green tea or milk to whisky. You can add a little water, but not a lot of ice.”
Conclusion: the reason we add ice can be for aesthetics, to stretch out the time spent on one glass, for cooling, and for dilution. However, the number one reason enthusiasts add water is … drumroll please … because adding a little water actually opens up a whisky to show more aromas and flavors.
A little water opens up a whisky to show more aromas.