Goron Spice is a special type of spice that the Gorons in Breath of the Wild cultivate. It has a variety of uses, including healing and restoring energy. If you're looking to get your hands on some, you'll need to head to Goron City and speak to the Goron Elder. He's the one responsible for its production. You can also purchase it at Goron Gusto Shop or get it from Yammo, the traveling merchant near the Tabantha Great Bridge.