Cassia is a type of cinnamon that comes from the Cinnamomum cassia tree, primarily grown in China and Indonesia. It's often referred to as Chinese cinnamon. Cassia whole tube could refer to a form of whole cassia bark sold in cylindrical shapes or tubes.
Cassia bark is known for its strong, spicy-sweet flavor and aroma, which is similar to but stronger and more pungent than true cinnamon (Cinnamomum verum). It's commonly used in both sweet and savory dishes, particularly in Asian cuisine,
where it's used in curries, stews, soups, and desserts.
Using cassia in its whole tube form allows for the flavor to slowly infuse into dishes during cooking, and it's often removed before serving.
It can also be ground into powder for use in recipes that call for ground cinnamon or added directly to dishes for a more pronounced flavor.
If you're looking to use cassia whole tube in your cooking, it's typically available in well-stocked spice shops or can be purchased online.
Just remember to store it in an airtight container away from heat and light to preserve its flavor and aroma.