Arrowroot and Kudzu – What’s the Difference?
A Arrowroot is a powdered starch made from a tropical tuber of the same name. Arrowroot is similar to cornstarch in appearance but once cooked it is clear and shiny rather than cloudy and translucent.
Kuzu is a high quality starch made from the root of the kudzu plant that grows wild in the mountains of Japan and in the southern region of the U.S. Kuzu is more expensive than arrowroot and is reputed to strengthen the digestive tract.
Both can be used interchangeably for thickening liquids, sauces, gravies, etc. by dissolving it in a small amount of cool liquid. I suggest having both in your kitchen.
Dissolved in cool water, usually 1 tablespoon per arrowroot/kuzu to 2 tablespoons liquid, mix well, then stir slowly into whatever sauce etc. you are cooking. You will see the liquid start to thicken, continue to stir and let cook for at least about five minutes.
I find if you fail to mix the arrowroot well, it can have a chalky aftertaste. So, make sure you mix it well, and stir it in slowly and thoroughly while cooking.