This is my go-to Dry Martini. I chose a 5:1 ratio as our 'preferred' Dry Martini specification in deference to David Embury who writes of this cocktail...
A Martini without Vermouth is just a chilled shot of gin; akin to a Manhattan without Vermouth being just a chilled shot of Bourbon. Tossing an olive, onion or twist into gold gin does little to remedy that state; anymore than tossing a cherry into Bourbon does. One might as well leave the gin in the icebox and forego the charade?