Prepare the Chicken:
Pat the chicken dry with paper towels and season lightly with salt and pepper.
Cook the Chicken:
Heat olive oil in a large skillet over medium-high heat. Add the chicken pieces and cook until browned and fully cooked (about 4-5 minutes per side). Remove the chicken and set aside.
Make the Sauce:
In the same skillet, reduce the heat to medium and add minced garlic. Sauté for about 30 seconds until fragrant. Pour in the bourbon (if using) and let it simmer for 1-2 minutes to cook off the alcohol.
Combine the Ingredients:
Stir in the soy sauce, brown sugar, chicken broth, apple cider vinegar, ketchup, and chili flakes (if using). Bring the mixture to a gentle simmer.
Thicken the Sauce:
Mix the cornstarch and water in a small bowl, then stir it into the skillet. Allow the sauce to thicken, about 1-2 minutes.
Combine Chicken and Sauce:
Return the cooked chicken to the skillet and toss to coat evenly in the sauce. Let it simmer for another 2-3 minutes to absorb the flavors.
Serve:
Garnish with chopped green onions or sesame seeds. Serve hot over steamed rice or with your favorite side dishes.