How is an extra dry martini prepared in terms of vermouth?

An extra dry martini is characterized by its minimal use of vermouth, often leading to a very crisp and clean flavor profile. While the term "extra dry" might imply the absence or very low amounts of vermouth, the ideal way to prepare one generally includes a very small amount to maintain the essence of the cocktail.

The option indicating a splash of dry vermouth reflects this preparation style. A splash provides just enough vermouth to subtly enhance the botanicals of the gin without overpowering it, aligning with the expectations of those ordering an extra dry martini.

This approach maintains the classic martini character while satisfying the preference for a cleaner drink with less vermouth. The other potential measures like a count or half a count could imply slightly more vermouth than desired for an extra dry version, and not using any vermouth at all would stray from the traditional definition, which typically allows for at least a hint of the vermouth to balance the drink.