Season the chicken with salt and pepper.
In a large bowl, toss the chicken with cornstarch and flour until well-coated.
Heat oil in a deep fryer or large pot to 350°F (175°C). Fry the chicken in batches until golden and crispy, about 8-10 minutes. Drain on paper towels.
In a saucepan over medium heat, combine gochujang, honey, brown sugar, soy sauce, rice vinegar, garlic, ginger, and sesame oil. Stir and simmer for 2-3 minutes until slightly thickened.
Toss the fried chicken in the sauce until fully coated.
Garnish with chopped scallions and sesame seeds before serving.