Coriander seeds are the dried berries of the coriander herb but have little similarity in taste to fresh coriander. The seeds can be bought whole or in powdered form. Ground coriander is a main component of many different spice mixtures including garam masala and harissa. It's also good added to savoury pickles, chutneys, or casseroles and can be used in cakes and other baked goodies. Crushed whole coriander seeds are delicious for flavoring homemade burgers.