Preheat your oven to 425°F (220°C). Grease a baking dish or a rimmed baking sheet with oil.
Pound the chicken breasts to an even thickness for uniform cooking, or cut them into thinner pieces if desired.
In a bowl, toss the chicken breasts with the garlic powder, onion powder, paprika, dried parsley, dried mustard, chili powder (if using), kosher salt, black pepper, and olive oil until evenly coated.
Place the seasoned chicken in the greased baking dish.
Bake in the preheated oven for 18 to 20 minutes, or until the internal temperature reaches 165°F (74°C).
Remove the chicken from the oven and let it rest for several minutes before slicing.
Serve and enjoy your delicious baked chicken!
Notes
Grease the baking dish to prevent sticking, use a meat thermometer for safety, and allow the chicken to rest for juiciness.
Store leftovers in an airtight container in the fridge for up to 4 days.