The Jameson Caskmates release is a unique whiskey that has been made with the help of Cork's Franciscan Well brewery. Barrels that had been previously used for Jameson whiskey were taken to the Franciscan Well Brewery to use in the ageing of their full-bodied craft stout. Once used for beer maturation they were sent back to the distillery where Jameson whiskey that had already been aged was filled into them for a finishing period.