Grappa is a grape-based distilled spirit from Italy, distilled from pomace and containing alcohol. Some Grappa are subjected to aging in wooden barrels, where they acquire greater complexity and take on a golden or amber colour. It is white, i.e. colourless, just like all distilled spirits and transparent when they come out of the still. So White Grappas are young grappas that have not been aged in wood, but simply diluted and filtered prior to bottling. For example, we suggestLa Grappa 903 Tipica by Nonaventura Maschio.
They only have the aromas deriving from the distillation of the pomace. If the pomace comes from an aromatic grape variety such as Muscat, Grappa giovane aromatica (young aromatic) is produced. We may suggest trying Grappa Il Moscato by Nonino.