Here, the word "perfect" refers not to the quality of the cocktail (though we do love this version), but to the equal amounts of sweet and dry vermouth used to make it.

Ingredients

　　2 ounces rye or bourbon whiskey

　　1/2 ounce sweet vermouth

　　1/2 ounce dry vermouth

　　2 dashes Angostura or orange bitters

　　Maraschino cherry or small piece lemon peel for garnish

　　In mixing glass or cocktail shaker filled with ice, combine whiskey, vermouth, and bitters. Stir well, about 20 seconds, then strain into cocktail glass. Add cherry or twist lemon peel directly over drink to release essential oils, and serve.