
A sugar cube is useful when sugar needs to be soaked with bitters and muddled in the glass. It is not just a measure, but part of the technique in old-fashioned drinks. Additions like this sit between flavor and aroma. They are easy to underestimate, but they can make a familiar recipe warmer, spicier, or more dimensional. Dose aromatic and sweet details on the low side, especially in new recipes. They should support the cocktail's main idea rather than become a separate smell rising from the glass.