Cinnamon comes from the bark of an evergreen tree that grows in Southeast Asia. Cinnamon's flavor and aroma come from an essential oil found in the bark. This oil makes up about 1% of the bark.
Indonesia, China, Vietnam, and India are the primary sources for cinnamon. True cinnamon (also called Ceylon Cinnamon) that uses only the inner bark is finer in composition and mellower in taste. Cassia Cinnamon, which comes from all layers of the bark, is stronger, rustic, and woodier in flavor. Some believe it is harsher than Ceylon Cinnamon. Almost all cinnamon on store shelves in the United States is Cassia.
Cinnamon is used in a variety of drinks, both alcoholic and nonalcoholic. Probably the most common drink for cinnamon is hot chocolate.