The hazelnut is the edible nut of the hazel tree, belonging to the genus Corylus. It is round or oval in shape and has a hard shell that encases a sweet, creamy kernel. Hazelnuts are commonly used in various culinary applications, including desserts, spreads, and snacks. They are also a key ingredient in Nutella, a popular chocolate-hazelnut spread. Rich in nutrients, hazelnuts are a good source of healthy fats, vitamins, and minerals. They contain antioxidants, which can help protect the body from oxidative stress. Additionally, hazelnuts are often enjoyed raw, roasted, or ground into flour, making them versatile in both sweet and savory dishes.