Cinnamomum burmannii, also known as Indonesian Cinnamon, Padang Cassia, or Korintje, it is one of several plants whose bark is sold as the spice cinnamon. The spice is the least expensive of the three forms of cassia as it has the lowest essential oil content. The most common and cheapest type of cinnamon in the US is made from powdered Cinnamomum burmanni. As a result of the low oil content, Indonesian Cinnamon may have less of the mildly toxic substance coumarin than does cassia. It is also sold as neat thick quills which are made of one layer..