The Perfect Brandy Manhattan is a variation on the classic Manhattan cocktail, made with brandy instead of whiskey, and using equal parts sweet and dry vermouth, just like the standard Perfect Manhattan. Add in a dash or two of Angostura bitters, and you've got an excellent, classic cocktail.Swapping the spirits in the Perfect Brandy Manhattan makes a fairly substantial difference in the flavor profile, especially if you're used to using a spicy rye whiskey. This is balanced out a bit by the…