Cinnamon is a spice that is typically found in baked goods, spiced drinks and many different savoury dishes. Ground cinnamon can be sprinkled in a dish and eaten, while cinnamon sticks are taken out of a dish before it is eaten. If your recipe calls for ground cinnamon and you only have sticks, simply grind them up -- one stick equals roughly 2 ml (1/2 tsp) of cinnamon.
Grate the cinnamon stick on a fine grater. Be careful not to cut your fingers when using the device. Certain varieties of cinnamon may be difficult to grate with this method.
Break the cinnamon stick into smaller pieces -- 1.25 cm (1/2 inch) is a good length. Put the pieces into a coffee grinder.
Grind the pieces until they are a very fine powder. Measure out the amount of cinnamon you need for the recipe.
Put the extra powder into an airtight container or plastic zip-top bag. It will last roughly six months.
A fine grater works well for small amounts of cinnamon. If you need a lot, consider using a grinder, as it goes much quicker.
If you grind a lot of cinnamon, think about getting a grinder just for that job.