Cassia cinnamon, often referred to as Chinese cinnamon, is a spice derived from the bark of the Cinnamomum cassia tree. It is commonly used in cooking and baking for its warm, sweet flavor. Cassia cinnamon is darker and has a stronger taste compared to Ceylon cinnamon, which is considered the "true" cinnamon. This type of cinnamon is widely available and more affordable than Ceylon cinnamon. It contains higher levels of coumarin, a compound that can be harmful in large amounts. Therefore, moderation is advised when using Cassia cinnamon in recipes or as a supplement.