From Cocchi:

Cocchi Americano, for its nature, represents the link between wine and liquors being a wine plus a small quantity of alcohol bittered (“amaricato”) by the infusion of precious herbs and spices: white wine, sugar, herbs and spices infusion in alcohol and in particular gentian flowers and leaves, Wormwood, Cinchona bark, bitter orange peel, elderflower and others.
To produce Cocchi Americano, white wine is aromatized with the extracts obtained through a cold infusion in alcohol, then refined for balancing the spices’ aromas and tastes.