The original martini, allegedly invented in the US in the 1860s, was made with sweet vermouth. One of the first recipes for a dry martini, made with dry vermouth, appeared in Frank P. Newman’s 1904 American Bar. Slideshow: Classic Cocktails
In a mixing glass, combine the gin, vermouth and bitters. Fill the glass with ice and stir well. Strain into a chilled martini glass or coupe and garnish with the olive or lemon twist.