Begin by gathering all your ingredients for the Creamy Ranch Chicken. Ensure that your sour cream is at room temperature, which will help in mixing smoothly into the sauce later on. Measure out the cream of chicken soup, milk, ranch seasoning, and any optional herbs to streamline the cooking process.

In a large skillet, heat a splash of oil over medium heat. Once the oil shimmers, carefully add the seasoned chicken breasts. Sear them for about 5-7 minutes on each side, until they turn golden brown and are no longer pink in the center. Use a meat thermometer to ensure an internal temperature of 165°F. Once cooked, remove them from the skillet and set aside.

In the same skillet, reduce the heat to medium-low and add the cream of chicken soup, milk, sour cream, and ranch seasoning. Stir well with a wooden spoon, scraping up any flavorful bits stuck to the bottom, and let the mixture simmer for about 3-5 minutes. The sauce will thicken slightly and the flavors will meld together beautifully.

Return the seared chicken breasts back into the skillet, nestling them in the creamy ranch sauce. Let them simmer for an additional 3-5 minutes, allowing the chicken to absorb the rich flavors. Flip the chicken occasionally so they are evenly coated and heated through, ensuring they're perfectly intertwined with the luscious sauce.

Once ready, serve your Creamy Ranch Chicken straight from the skillet for a rustic look. Spoon the creamy sauce generously over the chicken and serve alongside your favorite sides, such as baked potatoes or steamed vegetables.