Mix equal parts Campari, sweet vermouth (the red one) and gin, and serve over ice with a strip of orange zest.

FORBES: The Beer-Drinker's Cocktail

Never the less, many Manhattans, including the one I ordered years earlier, mix bourbon and sweet vermouth in a cocktail glass, leaving out the bitters.

BBC: The Manhattan mistake most people make

Cocktail menus across the country, for example, feature The Brooklyn, a perfect Manhattan that replaces sweet vermouth with orange-flavoured Amer Picon and bitters with maraschino liqueur.

BBC: The Manhattan mistake most people make

At The Growler in the Financial District, bartender Derek Brown made us, at his suggestion, three varieties of rye Manhattans: a sweet (classic), dry, and perfect, using sweet vermouth, dry vermouth and mix of the two.

BBC: The Manhattan mistake most people make