Chicken and Dumplings

Name: Chicken and Dumplings
Cuisine: American
Ingredients: **Soup Base:**; 1 tbsp olive oil; 2 lbs bone-in (skinless chicken breasts or thighs); Salt and pepper (to taste); 5 tbsp butter; 1 small yellow onion (diced); 1 cup carrots (diced); 2 sticks celery (diced); 3 cloves garlic (minced); 1 tsp Worcestershire sauce; 1 tsp hot sauce (optional); ⅓ cup flour; 4 ½ cups chicken broth; 1 chicken bouillon cube (optional); 1 ½ cups half-and-half; ¾ cup frozen peas; 1 tsp onion powder; ½ tsp each dried basil (parsley, thyme, rosemary, mustard powder); ¼ tsp ground sage; ⅛ tsp pepper; **Dumplings:**; 2 cups all-purpose flour or cake flour; 2 tsp baking powder; ½ tsp baking soda; 1 tsp salt; ½ tsp garlic powder; 2 tsp sugar; ¾ cup cold sour cream; ¼ cup cold milk; 4 tbsp butter (melted)