The first known recipe of this drink is from 1891. While probably concocted in Manhattan, there is some debate as to whether it was created at Manhattan Club, as reported.
4 1/2 ounces rye or bourbon whiskey
1 1/2 ounces sweet vermouth
2 dashes Angostura bitters
2 Maraschino cherries
Fill a pitcher with ice and add the whiskey, sweet vermouth, and bitters. Stir vigorously until the outside of the pitcher is thoroughly beaded with sweat and is extremely cold to the touch.
Place a maraschino cherry in each cocktail glass. Strain the drink over the cherries and serve immediately.
Courtesy of epicurious.com