**Preheat the Oven**
- Preheat your oven to 375°F (190°C). Lightly grease a baking dish and set aside.
**Prepare the Chicken**
- Pat the chicken breasts dry with a paper towel. If they're thick, consider slicing them in half lengthwise for even cooking.
**Make the Coating**
- In a mixing bowl, combine sour cream, Parmesan cheese, garlic powder, onion powder, smoked paprika (if using), salt, and pepper. Mix until well blended.
**Coat the Chicken**
- Spread the sour cream mixture evenly over both sides of each chicken breast. Place the coated chicken in the prepared baking dish.
**Optional Crunchy Topping**
- If desired, sprinkle breadcrumbs evenly over the chicken for a crispy topping.
**Bake the Chicken**
- Bake in the preheated oven for 25–30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C). For a golden finish, broil for an additional 2–3 minutes.
**Garnish and Serve**
- Remove from the oven, sprinkle with chopped parsley if desired, and serve hot with your favorite sides.