Vinsanto is the traditional sweet wine of Santorini. The island’s white grapes, especially Assyrtiko together with Aidani and Athiri, are harvested at the end of August and spread on the ground in the sun for eight to twelve days. As they lose water, the berries concentrate sugar and acidity, and the must pressed from them is thick and very sweet.
Fermentation is slow and stops on its own, leaving a large portion of the sugar in the wine, without addition of alcohol. Afterwards vinsanto is aged in old barrels for many years; according to the association Wines of Greece, some wines spend more than forty years in wood. Over time the color moves from amber to dark brown, and the aroma recalls raisins, dried fig, honey, coffee and orange peel, always with the bright acidity of Assyrtiko.
Production is part of the Protected Designation of Origin Santorini, which covers the island’s vineyards, grown on volcanic soil with vines trained in a basket shape low to the ground to protect them from the wind.
Santorini vinsanto is different from the Italian vin santo, produced in regions such as Tuscany.