Adding ice to Scotch instantly makes for a more refreshing experience, but it can also significantly change the flavor profile as it dilutes the whisky. Chilling whisky has the effect of muting some flavors, and enhancing others.
To find a balance that works for you, consider the amount, shape and size of the ice, as well as the measure of whisky. The more ice in the glass, the slower it will melt – and the impact will, of course, be greater on a single measure than a double.
Some people prefer to use a single, larger ice cube or even an ice ball to really slow the rate at which it melts. Another option is to invest in some whisky stones – made of metal or soapstone – to use as a replacement to ice. So if you like your whisky cold, but don’t want the effects of dilution – whisky stones may well be the right choice for you.
However you chill your Scotch, the act of taking small sips and savoring each one will rapidly bring the temperature back up. As the whisky warms, the taste will evolve – allowing you to experience a broad spectrum of flavor.