Khanom Chan, also known as steamed pandan layer cake, is one of the desserts which cannot be mass produced. Even if we find it in supermarkets, it will expire in a few days. That is a good sign showing that it rarely has unnecessary preservatives.
To make an authentic Khanom Chan, I highly recommend using fresh pandan juice instead of pandan essence(colorant). Pandan is a plant grown in Southeast Asia. A vibrant green juice can be extracted from its leaves which offer a unique fragrance to the cake. We can easily buy the leaves from Malaysian stores in wet markets. They also sell the essence. In case you don’t have a food processor at home, you can mix a few drops of pandan essence with water to replace the juice.