To prepare the chicken, make shallow cuts across each chicken thigh about 1 inch apart without cutting all the way through, then season both sides with the salt and white pepper, then lightly coat with the cornstarch and dust off the excess.
To pan-fry the chicken, in a pan over medium-high heat, add the cooking oil and place the chicken smooth-side down and cook for about 4 minutes until golden brown, then flip and cook another 4 minutes until golden brown, then remove.
To make the sauce, in the same pan over medium heat, add the butter, garlic, soy sauce, honey, brown sugar, and chicken stock and stir until combined.
To glaze the chicken, return the chicken to the pan and simmer for about 5 minutes, occasionally spooning the sauce over the chicken until glossy and sticky.
To serve, slice the chicken into bite-sized pieces and spoon the extra sauce over the top before serving.