Alkaline Solution

Alkaline solution is used in kueh ko swee to give it its chewy and springy texture. It is the same ingredient that is found in yellow noodles, contributing to its hue; as well as in dim sum items such as cha siew bao. It is available in bottled form as potassium carbonate often under the Koon Chun brand name. In the past, Nonya cooks obtained ayer abu by adding a whitish ‘rock’ to boiling water. The solution was stored in large glass bottles for use when required.