Why a large clear ice cube changes an Old Fashioned
An Old Fashioned has few ingredients, so temperature and dilution are part of the recipe. A large cube has less surface area relative to its volume than several small cubes. Because less ice touches the drink at once, it generally melts more gradually after serving.
Clear ice is mainly a visual improvement, but its usual density and large format can also make it a practical serving choice. The cube should be cold, solid, and free of freezer odors. A cloudy cube can still make a good drink, but trapped air and cracks make the presentation less polished.
