Kudzu Starch Jelly (葛餅, Kuzu-mochi)

Kuzu-mochi begins as a white powder that seems too modest to become anything beautiful. Add water and heat, and for a few minutes it looks like paste. Keep stirring. Then the whole pot changes, turning glass-clear and pulling from the pan in heavy, elastic folds. This is summer wagashi, Japanese confectionery, at its quietest, and it isn't difficult. It only asks that you don't stop too soon.

Use hon-kuzu, pure kudzu root starch, if you can. Mixed kuzu-ko is often stretched with sweet potato or other starches; it will set, but it won't give the same cool transparency or clean bite. In a dish this plain, the starch is the flavor and the texture, so there's nothing to hide behind the syrup. The kuromitsu and kinako arrive later as fragrance, not rescue.

The detail that decides it is full cooking. The mixture thickens before it's ready, the way a student raises his hand before he knows the answer. Wait for clarity, shine, and weight. Cooked long enough, the starch loses its raw chalkiness and sets into trembling cubes that take kinako like dry earth taking rain. Chill it briefly, serve it the same day, and leave the bowl a little empty. Cold sweets should refresh the table, not conquer it.