Prepare the chicken thighs by seasoning with salt, pepper, garlic powder, potato starch, and flour.
Heat oil in a large skillet over medium-high heat until shimmering.
Add the seasoned chicken thighs to the skillet, cooking for 5-7 minutes per side until golden and cooked through.
Remove the chicken from the skillet and set aside, but keep the skillet on heat.
Add minced garlic and red chili flakes to the skillet, sautéing for 1-2 minutes until fragrant.
Pour in the chicken stock, honey, rice vinegar, and dark soy sauce, stirring well to combine.
Bring the sauce to a simmer and mix the cornstarch with a tablespoon of water before adding it to the skillet, allowing it to thicken.
Return the chicken to the skillet, ensuring it's well coated in the sauce before serving.