First, finely chop your peanuts if they are still whole.
In a bowl, mix together the brown sugar and peanuts.
In a separate bowl, combine the glutinous rice flour and water. You can use chopsticks or a wooden spoon to mix until it becomes a smooth paste (see photos).
Grab about a couple tablespoons of dough and flatten into a circle. Curl your hands so the dough forms a cup, and pour in some of the peanut and sugar mixture.
Pinch and seal the dough, and roll it into a smooth ball. Place it on a plastic-wrap lined plate, and repeat until you’ve used up all the dough.
In a medium pot, boil enough water to cover the rice balls. Add the rice balls and wait until they float. This should only take about 5 minutes.
Remove the rice balls from the water, and enjoy while hot!