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...
If you have never had a Rob Roy with a Spanish style sweet vermouth then I highly recommend you try it. Monkey Shoulder blended Scotch and Lustau Vermut go so well together.
Ran a side by side by comparison of carpano and Dolin rouge as the vermouth here. The subtlety of the Dolin was hands down winner for me. Used a single malt and abbots bitters.
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.