The original recipe relied on gaz-angebin, a sweet manna left by insects feeding on a wild Astragalus shrub in the Zagros mountains west of Isfahan — the source of the sweet's name.
Whipped egg whites are combined with sugar (traditionally gaz-angebin), rosewater, and whole pistachios or almonds, then set into a soft, chewy nougat and cut into rounds dusted with flour. Isfahan's confectionery shops sell it as the city's defining souvenir sweet.