They lack the outer shell that specifically distinguishes that botanical category, as do a number of other technical non-nuts, like peanuts and Brazil nuts ... you probably won't confuse them with the ...
They are sold in the shell or as kernels. Hazelnuts are grape-sized, and they taste sweet and rich. Hazelnuts are a type of tree nut. They can be eaten raw or roasted, and with or without the husk ...