Preheat the oven to 400ºF.
Heat a cast iron skillet over medium heat.
In a large bowl, combine the chicken breasts, olive oil, and spices. Toss until the chicken breasts are evenly coated.
Once the cast iron skillet is hot, add the coated chicken breasts. Sear each side for 5 minutes.
Place the cast iron skillet in the preheated oven and bake for 28-35 minutes.