Measure 100 g glutinous rice flour (shiratamako) into a bowl and give it a quick whisk. Measure 90 ml water into a jug and pour half of it into the bowl. (If using mochiko, add 90 g glutinous rice flour (mochiko) and 10 g potato starch (katakuriko) to a bowl and whisk. Measure 80 ml water and pour half into the bowl.)
Mix with a spatula and add the rest of the water little by little until a dough forms (you might not need all of the water). Knead between each water addition until you have a smooth dough with the texture of an earlobe. Note: You do not need to use all of the water.
Start boiling a pot of water. While you wait, cut the dough in half and roll it into cylinders (if doubling or tripling the recipe, cut into quarters or sixths respectively). Cut each cylinder into 10 equal pieces then roll them into balls and press the center to make a dent.
Place on a piece of baking parchment to prevent sticking.
Once your water is boiling, gently place the shiratama dango into the pot and nudge them with chopsticks to stop them from sticking to the bottom of the pot. Boil until they float (approx 3 minutes).
When they are all floating, set a timer for 1 minute and prepare a bowl of ice cold water.
Turn off the heat and use a mesh spoon to transfer the cooked shiratama dango to the bowl of ice water. Leave to cool for 5-10 minutes.
Drain and serve topped with dark brown sugar syrup (kuromitsu) and roasted soybean powder (kinako) to taste. Enjoy!
If you have leftovers, place them spaced out on a tray lined with baking paper and freeze for 1 hour. After 1 hour, transfer to a sealable freezer bag and eat within 1 month. Thaw in the microwave (40-50 seconds 600W) or slowly in a bowl of water.
Notes
Best eaten the same day. Store in a bowl of cold water in the fridge until time to serve.If the dough is cracking or seems dry when you are rolling the balls, wet your hands to add a little more moisture to the dough.