Kudzu
A vigorous vine whose starchy root is processed into a fine white starch, used in Japan for thickening and for kuzuyu — a hot drink of dissolved starch that sets to a translucent gel as it cools. The same plant is a notorious invasive across the American South.
Identity
- Botanical name
- Pueraria montana
- Family
- Fabaceae
- Part used
- Root
- Origin
- East Asia; invasive in the southeastern United States
- Drunk in
- Nara, Kagoshima, Fukuoka, Korea
Character
Nearly neutral with a clean starchy sweetness, and a texture that is the whole experience — kuzuyu is thick, glossy and warming in the mouth in a way no infusion is.
Notes: starch, faint sweetness, earth
History
Kuzu starch production around Yoshino in Nara has been a named regional craft since the Edo period and remains one of the most labour-intensive food processes in Japan. The plant was introduced to the United States in 1876 and promoted for erosion control in the 1930s, which is how it came to cover several million acres of the South.
How it is drunk
Kuzuyu is a winter drink in Japan, made by whisking the starch into hot water until it clears and thickens. The starch also sets kuzumochi and thickens sauces, and the root is simmered as ge gen in Chinese soups.
Production
Roots are dug in winter, crushed, and the starch washed out and settled through repeated changes of cold water over weeks — a process that yields very little from a great deal of root. Most 'kuzu' starch sold cheaply is cut with potato or sweet potato starch.
Preparation
Whisked · Decoction
Boiling and decoction
1–3 g/100 ml · 98–100 °C · 20 min
What gets confused
Pure Yoshino kuzu is expensive and most retail kuzu starch is blended with cheaper starches. The pure product dissolves clear; blends stay cloudy.
Common mistakes
- Adding the starch to hot water. It must be slaked in cold water first or it seizes into lumps.
Comparisons
- Kudzu vs polygonatum — Two East Asian roots that produce entirely different kinds of drink. One is a starch whisked into a hot gel; the other is roasted and brewed into what Korea serves instead of water.
- Marshmallow root vs kudzu — Two materials chosen for texture rather than flavour, one of which thickens a drink into a gel and the other of which merely makes it slippery.
Evidence for this page
This page is TeaHQ synthesis throughout. No external source stands behind any statement on it, including the botanical name. Twenty of the 150 botanicals have had their names and distribution checked against a taxonomic authority and this is not one of them.
Brewing parameters here are typical practice for the category rather than measurements of this plant, and each set says so.
This page makes no safety claim. It describes what Kudzu is, where it comes from and how it is prepared — not what it does to a person. The absence of a safety note here is not a statement that the plant is safe. How TeaHQ handles this.