Nougat is a family of confections made with sugar or honey, roasted nuts (almonds, walnuts, pistachios, hazelnuts, and macadamia nuts are common), whipped egg whites, and sometimes chopped candied fruit. The consistency of nougat is chewy.
Two basic kinds of nougat exist. The first, and most common, is white nougat or Persian nougat made with beaten egg whites and honey; it appeared in the early 7th century in Spain with Arabs. The second is brown nougat which is made without egg whites and has a firmer, often crunchy texture. - Wikipedia