Cinnamon is a spice that typically found in baked goods, spiced drinks and many different savory dishes. Ground cinnamon can be sprinkled in a dish and eaten, while cinnamon sticks are taken out of a dish before it is consumed. If your recipe calls for ground cinnamon and you only have sticks, simply grind them up; one stick equals roughly 1/2 tsp. of cinnamon.
Grate the cinnamon stick on a a microplane (a microplane is a small, very fine grater). Be careful not to cut your fingers when using a microplane. Certain varieties of cinnamon may be difficult to grate with this method.
Break the cinnamon stick into smaller pieces; 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 microplane 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.