These nuts are often paired with chocolate. Hazelnuts are also known as filberts, filbert nuts, or cob nuts. The plant, corylus avellana, is native to Europe and Asia. Expect woodsy flavors and a slight bitterness in every bite of this nut. You can eat hazelnuts raw but several preparations call for roasted hazelnuts. The toasting process bring out more of the hazelnuts’ natural flavors. Hazelnut paste, which is made from ground hazelnuts, is widely used in making desserts and pastry confections. The flesh of hazelnuts appears off-white. Select hazelnuts that are robust with no signs of shriveling, withering, or water damage. Hazelnuts are a great source of vitamin E and unsaturated fats.