Scotch powerhouse Johnnie Walker recently launched the first permanent addition to its main range in 15 years—and it’s aimed at bourbon drinkers. Called Johnnie Walker Black Cask, the new blended Scotch whisky is aged entirely in American white oak barrels that once held bourbon, a choice meant to make the whisky feel more familiar and approachable, especially for U.S. drinkers who may be new to scotch. (If it’s from Ireland and the U.S., it’s spelled “whiskey.” If it&...