Ground cinnamon is made by grinding these quills into a fine powder. Use cinnamon sticks in soups, stews or beverages, then remove before serving. Beyond baking, cinnamon also shines in savory cooking. Both sticks and ground cinnamon should be kept in airtight containers away from heat, light and moisture. Ground cinnamon stays fresh for about six months before losing potency, while sticks can last up to a year.