Heat 2 inches of oil in a wok or a large pot to 375°F (190°C) on medium heat. Meanwhile, if the chicken is in a bag, transfer them into a large mixing bowl and add about ¾ cup of the rice flour and mix until there are no more lumps (your hands are best for this, but tongs are fine too). Add more rice flour as needed to get a thin batter that thinly, but thoroughly, coats the chicken. If the batter has become too thick, add a little water at a time to thin out.
Oil for frying, 1 cup rice flour
Once the oil is ready, add half of the chicken (or all of it if you've got the pan space) and allow the oil temp to drop to about 300°F/150°C - and from this point on, adjust the heat to maintain the temperature at 300°F/150°C.
Fry the chicken, flipping them every 1-2 minutes until dark meat reaches 175°F/79°C internal temp, and breast (if using) reaches 155°F/68°C. The chicken should have a deep brown colour. Drums and thighs should take 10-12 minutes, and whole wings about 6-8 minutes; but timing will vary depending on the size of the chicken and how cold they were to start.
Let the chicken cool for 5-10 minutes before eating so as to not burn yourself with incredible juiciness! Serve with sticky rice and fried shallots. I like to put the shallots on the sticky rice, but if not serving sticky rice you can just eat it along with the chicken.