Heat the oven. Preheat oven to 450\xB0F.
Season the chicken. Place the chicken breasts in a single layer in a large baking dish*. Brush on both sides (turning once) evenly with the melted butter or olive oil. In a separate small bowl, whisk the salt, pepper, garlic powder and paprika until combined. Then sprinkle the mixture evenly over the chicken on both sides. Bake. Bake for 15-18* minutes, or until the chicken is cooked through and no longer pink. Cooking time will depend on the thickness of the chicken breasts, so I recommend using a cooking thermometer to know exactly when it is fully cooked. The thickest part of the breast, it should be 165\xB0F. (Or, if you want the chicken to be a little bit browned and crispier on top, you can turn the broiler on high for the final 3-5 minutes and broil the chicken until it is cooked through and golden on top. Keep a close eye on the chicken so that it does not overcook and/or burn.)
Rest the chicken. Once the chicken is cooked, remove the pan from the oven, transfer the chicken to a clean plate, and loosely tent the plate with aluminum foil. Let the chicken rest for at least 5-10 minutes.
Serve. Serve warm. Or, refrigerate in a sealed container for up to 3 days, or freeze for up to 3 months.