In a mixing glass filled with ice, combine the sweet vermouth, rye whiskey, and a few dashes of Angostura bitters.

Stir the mixture thoroughly until it reaches a well-chilled state, ensuring the flavors meld beautifully.

Take a chilled cocktail glass and strain the concoction into it. The Reverse Manhattan is traditionally served "straight up," without ice.

For garnish, drop in a maraschino cherry to add a vibrant pop of color and a hint of complementary flavor.

If desired, feel free to explore other garnish options such as a twist of lemon or a sprig of fresh herbs to impart your unique twist to this timeless cocktail.