Gaz is the traditional name of Persian nougat originating from the city of Esfahan, located in the central plateau of Iran. Ppistachio or Amond kernels, rosewater and egg white give gaz its distinctive flavour, rendering it unique when compared to European nougats.
Nougat is a term used to describe a variety of similar confectioneries made with sugar or honey and roasted nuts (typically almonds, walnuts, pistachios or hazelnuts) and sometimes candied fruits.
Traditionally (as well as today) gaz-nougat is hand made and fashioned into individual round piece of about 2-3 inches in diameter and half an inch in thickness- packed into a box and covered with plain flour to keep the pieces from sticking to one another. They may be cut into bite-sized pieces, but are more often sold in larger sizes.