In a large mixing bowl, whisk together the light brown sugar, soy sauce, teriyaki sauce, melted butter, creole seasoning, and dry mustard until smooth and well combined.
Add the boneless skinless chicken tenderloins to the marinade. Make sure each piece is generously coated. Cover the bowl with plastic wrap and let it marinate in the refrigerator for at least 30 minutes, or up to overnight for maximum flavor.
Preheat your oven to 375°F (190°C). This ensures that your Sticky Chicken cooks evenly.
Remove the chicken from the marinade, allowing any excess to drip off. Place the tenderloins in a baking dish or sheet pan, arranging them in a single layer for even cooking.
Bake the chicken in the preheated oven for 25-30 minutes, or until the internal temperature reaches 165°F (74°C). Baste the chicken with the leftover marinade halfway through for extra flavor.
Once cooked, remove the Sticky Chicken from the oven and let it rest for a few minutes before serving. This allows the juices to redistribute. Serve it with your favorite sides, like rice or vegetables, and enjoy the explosion of flavors!