Creating Garlic Brown Sugar Chicken is simple when you follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Marinade: In a bowl, combine brown sugar, soy sauce, olive oil, minced garlic, ground ginger, black pepper, and red pepper flakes. Mix well.
3. Marinate the Chicken: Place chicken breasts in a large resealable plastic bag or shallow dish. Pour the marinade over the chicken, ensuring it is well coated. Let it marinate for at least 15 minutes (or up to 2 hours for more flavor).
4. Prepare for Baking: Lightly grease a baking dish or line it with parchment paper. Place the marinated chicken breasts in the dish.
5. Bake the Chicken: Pour any remaining marinade over the chicken. Bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
6. Glaze the Chicken: For a caramelized effect, broil the chicken for an additional 2-3 minutes, watching closely to prevent burning.
7. Rest and Garnish: Once done, remove the chicken from the oven and let it rest for 5 minutes. Garnish with chopped green onions before serving.

These straightforward steps will guide you in creating this incredible dish effortlessly.