If you prefer a martini with only vodka and the barest suggestion of vermouth, avert your eyes. Assertive gin and a healthy dose of vermouth mix here for a smooth version of the classic. If an olive takes up too much room in your cocktail glass, garnish with a lemon twist.
Combine the gin and vermouth in a shaker, fill it halfway with ice, and stir vigorously until well chilled, about 20 seconds. Strain into the chilled glass. Garnish with olives or a twist of lemon. (If using a twist, be sure to run the slice over the glass’s rim.)