Discard the bones and skin from chicken thigh. I get about 430g full meat. Grind with food processor but don't be too smooth so there will be some chicken texture in the chicken balls.
In large bowl combine ground chicken thigh and all Chicken Batter ingredients until evenly distributed.
In different plate combine all ingredients in Breading: Flour Mixture.
In different plate combine all ingredients in Breading: Egg Mixture.
Shape about 1/2 tbsp chicken batter into a ball. Coat the chicken ball respectively with flour mixture, egg mixture and then panko breadcrumbs. Do the same with the rest of the chicken batter.
In a pan, heat the cooking oil over medium heat.
Fry the spicy chicken balls until nice and golden.
After the spicy chicken balls are cooked, rest it on a cooling rack to remove excess oil.