Cinnamon sticks consist of rolled bark from cinnamomum trees grown in China and Sri Lanka. The two varieties of the trees are Ceylon and Cassia. Ceylon cinnamon sticks are preferred for grinding your own cinnamon because this variety is known as a true cinnamon. The cinnamon sticks can be ground into a powder that you can add to a variety of foods. Cinnamon sticks store almost twice as long as freshly ground cinnamon, so it's a good idea to only grind as much cinnamon as you need.
Place a grater over a large bowl.
Hold onto a cinnamon stick so that it lays flat on the grater. Use the smallest holes on the grater to grind the cinnamon sticks.
Rub the stick over the grater back and forth so that the ground cinnamon falls into the bowl.
Grind as many cinnamon sticks as you need. Avoid grinding the cinnamon sticks when they become too small to handle so that you don't cut your skin on the grater.
Examine the grated cinnamon. If you need the cinnamon granules to be smaller, you can place them into a coffee grinder.
One cinnamon stick will yield 1/2 tsp of ground cinnamon. Use ground cinnamon within six months for best results.
Store cinnamon sticks and ground cinnamon in airtight containers to keep the spice fresh.