The Brooklyn is a classic cocktail that was created before American Prohibition. It was named for the borough in New York City, and though it shares some similarities to its cousin the Manhattan in that it's made with whiskey and vermouth, this recipe is unique because it calls for Amer Picon, a bitter French liqueur.
Add rye, dry vermouth, maraschino liqueur, and Amer Picon to a mixing glass.
Fill mixing glass with cubed ice.
Using a bar spoon, stir for 30-45 seconds until well-chilled and slightly diluted.
Using a julep strainer, strain into a martini or coupe glass.