The De Rigueur is a classic cocktail that was created by Harry Craddock at the Savoy Hotel in London, England and was first published in his 1930 book The Savoy Cocktail Book. It is one of two similar recipes, the first being this French-inspired drink made with Scotch whisky, grapefruit, and honey and the second being an American drink called the Brown Derby made with bourbon instead of Scotch.
Add Scotch, pink grapefruit juice, and honey syrup to a shaker.
Fill shaker with cubed ice.
Shake for 10-20 seconds.
Using a Hawthorne and fine mesh strainer, strain into a coupe glass.
Garnish with grapefruit wedge.