Prep the Chicken

1. Preheat the Oven: Start by preheating your oven to 375°F (190°C). This ensures that your chicken cooks evenly and becomes perfectly golden on top.
2. Prepare the Baking Dish: Lightly grease a baking dish with cooking spray or a little olive oil to prevent sticking.
3. Season the Chicken: Place the chicken breasts in the baking dish and season with a little salt, pepper, garlic powder, and onion powder. This step adds some initial flavor to the chicken before the sauce goes on.

Make the Sauce

1. Mix the Sauce: In a medium bowl, combine the sour cream, mayonnaise, ranch dressing mix, Dijon mustard, lemon juice, garlic powder, onion powder, and black pepper. Stir until everything is well combined. The sauce should be creamy with a slight tang from the mustard and ranch seasoning.
2. Add Parmesan: Stir in the grated Parmesan cheese. This adds richness and a savory touch to the creamy base.

Assemble the Dish

1. Coat the Chicken: Spoon the creamy sauce generously over each chicken breast, ensuring they are well-covered. You can also spread it out evenly with a spatula or spoon to make sure the sauce is evenly distributed.
2. Bake: Place the baking dish in the oven and bake for 25–30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the top is golden and bubbly.

Serve and Enjoy

1. Serve the Chicken: Once the chicken is done, remove it from the oven and let it rest for a few minutes before serving. This allows the juices to redistribute, ensuring that each bite is moist and flavorful.
2. Pair It Up: Serve the chicken with mashed potatoes, steamed veggies, or a side salad for a well-rounded meal.