The classic, as it has evolved over more than a century of opinionated drinking.
• 2.5 oz London dry gin
• 0.25 to 0.5 oz dry vermouth
• Garnish: lemon peel twist or olives
Place gin and vermouth in a mixing glass. Add cubed ice and stir for 30 seconds until well chilled. Strain the drink into a chilled Martini glass. Garnish with a slice of lemon peel, expressing the essential oils over the drink, then dropping it into the liquid. Alternatively, garnish with speared olives. Serves 1.