Sherry cask

A Sherry cask is a wooden barrel that was originally used to age Sherry wine from Spain. When used for aging spirits like whiskey, these casks impart unique flavors, such as dried fruit, nuttiness, and sweet notes, thanks to the residual wine and the wood's interaction with the spirit. The aging process in Sherry casks enhances the complexity and depth of the whiskey, giving it distinct characteristics that are different from spirits aged in other types of barrels. This practice is popular for adding richness and a nuanced flavor profile to the final product.