Scotch whisky's answer to the Manhattan. The Rob Roy is classically made with Angostura Bitters, but in his 1948 The Fine Art of Mixing Drinks, as a footnote...
Made with half Dolin Rouge and half Punt e Mes, which I think cuts the sweetness a bit, and generous Peychaud's Bitters because I have no Abbotts. The last 2oz from a bottle of Johnny Walker Black. It's very nice and perfect on a cold fall evening in front of the fire.