Whiskies can acquire sherry flavors by resting in casks that previously held sherry, a fortified wine from the Jerez region of Spain. While sherry comes in a variety of styles, including dry fino and sharp, salty manzanilla, these are only occasionally applied to whisky. The darker-hued and aromatic oloroso is the more traditional choice, with sweet, rich Pedro Ximenez a tantalizing option.
The influence of oloroso sherry casks is identifiable as red fruit, figs, dates, and raisins, with Macallan and Glenfarclas as perhaps the most famous examples. The oak of the cask also plays a role, as it can be...
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