Step 1: Layer the Base
Place the diced onion in the bottom of your crock pot. Lay the chicken thighs on top in a single layer. This ensures even cooking and flavor throughout.
Step 2: Prepare the Sauce
In a bowl, stir together the cream of chicken soup, cream of celery soup, poultry seasoning, parsley, and a dash of black pepper. Pour this mixture evenly over the chicken. Then, add the chicken broth. This creates the creamy sauce that will soak into every bite.