I like to make these as essentially a built drink. I stir it in a mixing glass without ice to combine the ingredients prior to pouring it over a large ice cube in an un-chilled single old fashioned. Similar to scotch on the rocks. Alternatively, I’ll make the drink in its serving glass and gently add a large ice cube after stirring. Initially the flavors will be strong with very little dilution. As you sip the cocktail and gently swirl it, the drink will chill and dilute as the flavors mellow.