Corbin Cash Sweet Potato LiqueurInspired by founder David Souzas mothers sweet potato squares recipe, Corbin Cash Barrel Reserve Sweet Potato Liqueur is a truly unique creation. Made from 100 percent estate grown California sweet potatoes, it is distilled at lower proof to retain more flavor and aged in custom charred American white oak for up to 4 years. An utterly unique liqueur. Distilled from sweet potatoes, aged in oak, with brown sugar and a blend of spices and extracts added.