
Rosso vermouth is a sweet, aromatized fortified wine flavored with wormwood and other botanicals, colored deep red-brown, typically with caramel.
Without rosso, bianco vermouth comes closest: the balance holds, though the drink loses its red-brown color and dried-fruit depth. Dry vermouth works next, with a scant barspoon of syrup per 25 ml to bring the sugar back. In a Manhattan the color is part of the drink, so a pale swap shows at a glance. Any other brand of rosso swaps in one for one.
Bitter aromatized wine
Wine bittered with quinine or gentian, such as a quinquina or an americano. Swapped one for one for rosso, it makes the drink noticeably more bitter.
Dry vermouth
Under EU rules, a vermouth labeled dry has less than 50 g of sugar per liter. One labeled sweet, as rosso usually is, has 130 g or more. Dry vermouth is also pale rather than red-brown.
Bianco vermouth
A pale, sweet vermouth, much sweeter than dry.
Wine-based, so it oxidizes once open — refrigerate and use within six weeks before the fruit and herbal notes fade.
Bobby Burns
Blended Scotch whisky