Final answer:
The difference between an in and out martini and a dry martini is the amount of vermouth used and the preparation method. Dry martinis have a higher ratio of gin to vermouth, while in and out martinis feature a coating of vermouth swirled and then discarded before adding the spirit.
Step-by-step explanation:
The difference between an in and out martini and a dry martini lies in the vermouth content and the method by which they are mixed. A dry martini is characterized by its reduced amount of vermouth as compared to classic versions, with a typical ratio of gin to vermouth being 6-to-1 or even higher. It's a preferred style for those who want the flavor of the base spirit, such as gin or vodka, to dominate. An in and out martini, on the other hand, involves a different technique. Here, vermouth is poured into a mixing glass, swirled around to coat the inside, and then the excess is discarded. Only then is the gin or vodka added. This minimizes the vermouth flavor even more than a dry martini, creating a cocktail that’s almost purely the flavor of the base spirit .Both of these types of martinis can be further customized by garnishes such as olives or a lemon twist, depending on the drinker's preferences.