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How are grapes used in brandy production?

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distilled spirit The fermentation and distillation process for producing whiskey. The production of whiskey begins with grinding grain into a meal, which is cooked. Malt is introduced to the meal, which results in mash that is cooled and pumped into a fermenter, where yeast is added. The fermented mixture is heated in a still, where the heat vaporizes the alcohol. The alcohol vapours are caught, cooled, condensed, and drawn off as clean, new whiskey. This liquid is stored in a cistern room, and water is added to lower the proof (absolute alcohol content) before the whiskey is placed in new charred oak barrels for aging and later bottling.

In the production of brandy, grapes serve as the primary raw material. They are utilized in two main ways to create this distilled spirit:1

Wine Distillation: Grapes are first processed into wine, which is then subjected to distillation to produce brandy. This is the most common method, with specific regional examples including cognac and pisco.2
Pomace Distillation: Brandy can also be distilled from grape pomace, or marc—the solid remains (skins, seeds, and stems) left in the winepress after the grapes have been pressed for juice. Well-known examples of this type include Italian grappa and French eau-de-vie de marc.2

In both instances, the material undergoes fermentation, where yeast enzymes convert the sugars present in the grapes or grape products into ethyl alcohol before the mixture is distilled.31