Like most traditional Asian sweet dishes, Thai food colors are generally obtained by using natural ingredients. But if you come across some very loud and bright colors in Thai food today, they are more likely to have come from factory made 'food grade' colors. The attractive green color of the Khanom Chan dish is derived from the extract of pandan leaves, the leaves are called 'bai toey hom' in Thai. The fragrance in the Thai layered sweet dessert is partly derived from a drop or two of the extract from Jasmine flowers. Flour from the tapioca plant is another important ingredient in this sweet Thai dish.