16 ice cubes
4 orange slices
8 maraschino cherries
10 ounces Kentucky bourbon whiskey (recommended: Maker's Mark)
4 ounces vermouth
3 ounces Italian bitters (recommended: Campari)
3 teaspoons sugar, optional
Divide ice cubes between 4 tumblers. Garnish each glass with 1 orange slice and 2 maraschino cherries.
In a pitcher, blend the bourbon, vermouth and bitters and pour into tumblers.
If you like your cocktails to be a bit sweeter, you can stir 3 teaspoons of sugar into the pitcher before pouring the drinks.