Creating this flavorful dish is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 400°F (200°C).
2. Prepare the Spice Rub: In a small bowl, mix the brown sugar, chili powder, garlic powder, onion powder, smoked paprika, salt, and black pepper.
3. Prep the Chicken: Pat the chicken breasts dry with paper towels. Rub half of the spice mixture over both sides of the chicken.
4. Prep the Sweet Potatoes: In a large bowl, toss the sweet potato cubes with olive oil and the remaining spice mixture. Ensure the sweet potatoes are evenly coated.
5. Arrange on Baking Sheet: On a large baking sheet, place the seasoned chicken breasts in the center. Spread the sweet potato cubes around them in a single layer.
6. Bake: Place the baking sheet in the preheated oven. Bake for 30-35 minutes until the chicken reaches an internal temperature of 165°F (74°C) and the sweet potatoes are tender.
7. Rest the Chicken: Once cooked, remove the chicken from the oven and let it rest for 5 minutes to retain its juices.
8. Garnish and Serve: Optionally, garnish the dish with fresh cilantro for an added touch of flavor and color.

By following these steps, you’ll create the incredible Chili and Brown Sugar Spice Rub Chicken and Sweet Potatoes effortlessly.