A refreshing Japanese summer classic, these translucent kudzu starch noodles are gently boiled, shocked in ice water, and served in a fragrant toasted soybean syrup. The contrast between the slippery, springy noodles and the nutty, caramel-like syrup makes this an elegant cool-weather treat across Japan.
Prep Time20 mins
Cook Time10 mins
Total Time30 mins
Servings4
Yield4 servings
Nutrition Facts
Per serving (estimated)
- 220 kcalCalories
- 2 gFat
- 0.3 gSaturated Fat
- 52 gCarbs
- 1 gFiber
- 34 gSugar
- 2 gProtein
- 125 mgSodium
- 60 mgPotassium
- 30 mgCalcium
- 1 mgIron
- 0 mgVitamin C
- 5 mcgVitamin A
Ingredients
For the noodles
- 1 cup kudzu starch (or arrowroot starch)
- 3/4 cup cold water
- 1/2 tsp vegetable oil
- 1/4 tsp fine salt
For the kinako syrup
- 1/2 cup kinako (roasted soybean flour)
- 3/4 cup granulated sugar
- 1 cup water
- 1/8 tsp fine salt
For serving
- 4 cups ice water, for the bath
- 1 tbsp grated fresh ginger, optional
- 3 tbsp kuromitsu brown sugar syrup, optional
- 2 tbsp extra kinako, for dusting
Directions
- Combine the kudzu starch and salt in a bowl, then gradually pour in the cold water while whisking constantly to form a smooth, lump-free slurry.
- Stir in the vegetable oil, transfer the mixture to a small saucepan, and cook over medium-low heat while whisking continuously for 2-3 minutes until it thickens into a glossy, translucent paste.
- Spread the hot paste into a thin, even 1/4-inch layer on a parchment-lined sheet pan and refrigerate for 15 minutes until firm and sliceable.
- Bring a wide pot of water to a rolling boil, then use a sharp knife or bench scraper to cut the firm kudzu sheet into thin 1/8-inch strips, dropping them directly into the boiling water.
- Simmer the noodles for 2 minutes until completely translucent and springy, then drain and immediately transfer them to a bowl of ice water to halt the cooking and lock in their snappy chew.
- Meanwhile, prepare the kinako syrup by whisking together the kinako, sugar, water, and salt in a small saucepan over low heat until smooth, glossy, and slightly thickened, about 4 minutes.
- Strain the chilled noodles from the ice water and divide them between four chilled bowls, then drizzle generously with the warm kinako syrup.
- Top each bowl with a small dusting of fresh kinako, a pinch of grated ginger if using, and a thread of kuromitsu for extra caramel depth.
- Serve immediately with chopsticks and a spoon so diners can alternate bites of cool noodles and sweet syrup.
Cook’s Notes
- Pure arrowroot or sweet potato starch can replace kudzu starch in equal amounts, though kudzu yields the clearest, most elastic noodles.
- Strain the kinako syrup through a fine mesh sieve for a silkier finish that clings to the noodles.
- For an even more cooling dessert, chill the kinako syrup thoroughly in the refrigerator before drizzling.
- Eat the noodles within 30 minutes of shocking for the snappiest texture, as they will gradually soften in the syrup.
- A small pitcher of extra cold water on the side lets diners rinse off excess syrup between bites.










