Jameson Caskmates sees the reuse of old whiskey barrels. Nothing new in that, but in between, they've been used to age stout from Cork's Franciscan Well brewery. This has added notes of cocoa, coffee and butterscotch to this classic Irish whiskey.Jameson Caskmates is an intriguing release. Having sent some of their casks to the local craft stout brewers at Franciscan Well, the casks were returned to Midleton where they were subsequently used to give a stout finish to Jameson.