Cinnamon
Cinnamon is a dry seasoning used in small amounts for clear aroma and flavor. Add gradually, taste as you go, and refresh it when the smell turns dull.
Identity
Dry spice
Use small amounts and refresh stale jars.
Powdered spices spread quickly through a dish. Add a little at a time, bloom in fat when the recipe calls for it, and replace the jar when the aroma turns flat.
Wikimedia Commons
Reference image
Cinnamon reference image.

Source: Wikimedia Commons
Used In Recipes
Substitutions
Acceptable
King Arthur Apple Pie Spice -> Cinnamon
1 teaspoon King Arthur Apple Pie Spice or ground cinnamon
The source lists this as an alternative in the same ingredient row.
Source: Fresh Apple Cinnamon Scones
Acceptable
Cinnamon -> Vietnamese Cinnamon
1 tablespoon ground cinnamon or 2 teaspoons Vietnamese cinnamon*
The source lists this as an alternative in the same ingredient row.
Source: Cinnamon Star Bread