Cask and barrel whiskey refers to whiskey that has been aged in wooden casks or barrels. This aging process imparts unique flavors and aromas to the whiskey, depending on the type of wood used. For example, aging in oak barrels imparts notes of vanilla, caramel, and spice, while aging in sherry casks can impart notes of dried fruit and nuts.
Aging whiskey in casks or barrels is an important step in the production process, as it allows the whiskey to develop its full flavor profile. The type of wood used for the cask or barrel also plays a significant role in the final flavor of the whiskey.