Add rye whiskey, sweet red vermouth, and Angostura bitters to a mixing glass.
Fill the mixing glass with ice cubes.
Stir steadily for approximately 30 seconds until well chilled and properly diluted.
Strain into a chilled cocktail glass.
Garnish with a cocktail cherry and serve immediately.
Rye whiskey is the traditional and preferred base for a Manhattan - its spice and dryness cut through the sweetness of vermouth far more effectively than bourbon, which can make the drink cloying. Always stir, never shake: this is a spirit-forward cocktail that should be silky and clear, not aerated or cloudy.
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