Preheat the oven to 400°F
Line a baking sheet or baking dish with foil or parchment
Pat the chicken breasts dry
Trim any excess fat
Pound the chicken breasts to even thickness if needed
Brush or rub with oil
Season with salt, pepper, and any desired spices
Place the chicken breasts in a single layer on the baking sheet or in the baking dish
Bake for 18 to 25 minutes, depending on thickness
Check that the internal temperature reaches 165°F
Remove from the oven
Let the chicken rest for 5 to 10 minutes
Slice and serve