The Vodka Martini is a simple and versatile cocktail that can be tweaked to fit any palate. While you may know the classic James Bond line about shaking versus stirring, the true key to a classic Vodka Martini is to use high-quality vodka and vermouth, the two main ingredients. Those who like a briny undercurrent to their icy spirits can turn a Vodka Martini into a Dirty Martini by adding a splash of olive juice.