Start by patting the chicken dry with paper towels. This helps it sear nicely and pick up that golden color in the pan. Season both sides with the salt, black pepper, paprika, and garlic powder.
Next, heat the olive oil in a large skillet over medium-high heat. Add the chicken and sear it for 3 to 4 minutes on each side, until the outside is golden brown. It does not need to be fully cooked at this point, so do not worry if the center is still a little underdone. Transfer the chicken to a plate and set it aside.
Lower the heat to medium and add the butter to the same skillet. Once it melts, stir in the minced garlic. Let it cook for about 30 seconds, just until fragrant. The smell will be rich, buttery, and instantly comforting.
Pour in the chicken broth and scrape up all the browned bits from the bottom of the pan. That is where so much flavor is hiding. Then add the heavy cream, Parmesan cheese, Italian seasoning, parsley, and dill. Stir everything together until the sauce looks smooth and creamy.
In a small bowl, whisk together the flour and water until completely smooth. Pour that mixture into the skillet and stir well. Let the sauce simmer for 1 to 2 minutes, just until it thickens slightly. It should be silky and easy to spoon, not overly heavy.
Now preheat your oven to 375°F (190°C). Place the seared chicken pieces into a baking dish, then pour the creamy garlic herb sauce over the top, making sure each piece gets coated.
Slide the dish into the oven and bake uncovered for 20 to 25 minutes, or until the chicken is fully cooked and reaches an internal temperature of 165°F (74°C). The sauce will bubble gently around the edges, and the top will look rich and inviting.
When it is ready, spoon some extra sauce over the chicken just before serving. That final touch makes the whole dish feel even more luscious and comforting.