As served at New York’s 5 Ninth. If whiskey were French, this is my theory as to what it would taste like. Suave, subtle, and utterly untrustworthy. The delicate blond variety of Lillet, the French aperitif, is difficult to mix with, as it is easily overpowered by strong flavors; since Irish whiskey is neither sharply woody like American whiskey nor smoky like Scotch, it  works perfectly here.

2 ounces Irish whiskey
1 ounce white Lillet
1 teaspoon Cointreau
2 dashes orange bitters
To finish: lemon peel

Stir and strain into a chilled cocktail glass; twist lemon peel over the top.