Preheat your oven to 375°F. This crucial first step ensures the chicken cooks evenly and thoroughly.
Spray a 9×13-inch baking dish well with nonstick spray. This helps to prevent the chicken from sticking and makes cleanup easier.
Place the raw chicken breasts into the prepared baking dish in a single layer. Make sure they’re not overcrowded for even cooking.
In a medium bowl, using a hand mixer, beat the sour cream, cream cheese, heavy cream, minced garlic, onion powder, garlic powder, dried thyme, dried rosemary, kosher salt, and ground black pepper together on high speed until smooth. It’s important that the cream cheese is softened before mixing it in; otherwise, it won’t blend in smoothly.
Spread the creamy mixture evenly over the raw chicken breasts. This allows the flavors to infuse into the chicken as it bakes.
Bake uncovered for 40 to 45 minutes. The chicken is done once the internal temperature reaches 165°F. Use a meat thermometer to check the temperature at the thickest part of the breast.
Be careful not to overcook your chicken, as it can dry out. Keep a close eye on it during the last few minutes of cooking.
Once the chicken is fully cooked, remove it from the oven and stir the creamy sauce mixture around the chicken. The top layer may look a bit dry, but once you stir it, everything blends together beautifully.
Sprinkle fresh parsley over the top for a pop of color and freshness before serving.
Serve the Creamy Herb Chicken hot, and enjoy every delicious bite!