The Bijou is a classic cocktail that is believed to have been created by Harry Johnson in the 1800s and was first published in his book The Bartender's Manual. It features a blend of gin, sweet vermouth, orange bitters, and Green Chartreuse, and its name, which means "jewel" in French, was derived from the different gem-colored ingredients used to make it. Its garnish was also originally an olive before bartenders eventually started using a cherry to better suit the drink's flavor profile.
Add gin, sweet vermouth, Green Chartreuse, and bitters 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 coupe glass.
Garnish with cherry.