 Bottling of Yellow Spot had previously ceased in the 1950s, but information in original company journals and ledgers allowed Mitchell & Son to determine the original Yellow Spot was a blend of 12-year-old pot still whiskeys that were matured in a combination of Malaga wine casks (which impart a slightly sweet taste), bourbon barrels, and sherry butts.Although Malaga-matured Irish pot still whiskey is a rarity in modern production, when Mitchell & Son checked Irish Distillers' inventory, it found a supply of 12-year-old Malaga-matured pot still whiskey.This allowed Mitchell & Son to re-launch Yellow Spot using the same style of whiskey that was contained in the original.