Jameson Black Barrel with 4 Markham Marquis by Waterford Double Old Fashioned GlassesA combination of pot still and grain whiskeys, Jameson Black Barrel Select Reserve Irish Whiskey is matured in sherry and bourbon oak casks to unveil a complex palate of sherry nuttiness, vanilla, and creamy notes. Unlike other Jameson whiskeys, Black Barrel is aged in twice charred casks, producing a blend of rich flavors ranging from fruity hints of apple and nectarine to the creamy tones of the grain whiskey to the piquant flare of the pot still.