In the mainstream perception of blended Scotch, there’s Johnnie Walker, and then there’s everything else. The Diageo-owned giant can feel omnipresent in both liquor stores and bars, with visibility boosted by recent special editions and entertainment crossovers. (The “White Walker” “Game of Thrones” collab seemed too fitting to not exist.) And while the whisky world has grown both wider and deeper in recent decades, Johnnie Walker remains the best-selling Scotch, with roughly 22.1...
