A hazelnut is the nut of the hazel and is also known as a cob nut or filbert nut according to species. In commercial quantities, hazelnuts are produced in Turkey, Italy and in the American states of Oregon and Washington. Turkey is, by far, the largest producer of hazelnuts in the world.
I am finding a bit hard to get hazelnuts and had to make several phone calls before I finally got them from Vita Health, a natural food product store.
Extensively, Hazelnuts are used in confectionery to make praline and also used in combination with chocolate for chocolate truffles and hazelnut spread product such as Nutella. Hazelnut oil, pressed from hazelnuts, is strongly flavoured and used as a cooking oil.
Hazelnuts are rich in protein and unsaturated fat. Moreover, they contain significant amounts of thiamine and vitamin B6, as well as smaller amounts of other B vitamins. Additionally, 1 cup (237 ml) of hazelnut flour has 20 g of carbohydrates, 12 g of which are fibre.
The reason why I bought Hazelnuts was making my homemade ferrero rocher.