Rob Roy Cocktail Recipe 3 mins 1 drink Bourbon & Whiskey, Other Liqueurs Ingredients 50ml Whiskey 15ml Vermouth 4 dashes Bitters Get all your USA cocktail ingredients at ReserveBar Affiliate link — we may earn a commission at no extra cost to you. Directions Pour all the ingredients in a tall glass with ice. Stir gently to combine. Strain into a martini glass and garnish with a brandy cherry.