Oloroso
Fortified winesSpain
Oloroso is a sherry fortified to about 17%, so no flor forms. It ages in contact with air and turns dark, nutty and rich. In its true form it is dry.
Base grapes
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Sources
Facts: Wikipedia, Oloroso (CC BY-SA 4.0) and Wikidata Q2838270 (CC0). The description, the grape list and the bands are ours.