Their Rob Roy has single-malt Scotch, Oloroso sherry, and orange bitters. I don’t know specifically which Scotch, but it tasted more like from the Highlands or Skye, not Islay. I make Rob Roys at home - honestly Dewer’s plays better than my otherwise go-to Talisker, with some sweet vermouth and angostura bitters. I understand sweet vermouth is classic, and the Oloroso was noticeably different.
“Single-malt” refers to the way that particular type of Scotch is made - single distillery, barley, pot still, at least 3+ yrs.
