01 - Melt butter in a large pot or Dutch oven over medium heat. Add diced onion, sliced carrots, and celery. Sauté for 5 minutes until vegetables begin to soften.
02 - Stir in minced garlic, dried thyme, dried parsley, bay leaf, salt, and black pepper. Cook for 1 minute until fragrant, being careful not to burn the garlic.
03 - Pour in 6 cups chicken broth and bring to a boil. Once boiling, reduce heat to maintain a gentle simmer.
04 - Add shredded cooked chicken and frozen peas to the simmering broth. Continue simmering for 10 minutes while preparing the dumpling dough.
05 - In a medium bowl, whisk together flour, baking powder, and salt. Stir in melted butter and whole milk until just combined—do not overmix. Fold in fresh chopped parsley if using.
06 - Drop rounded tablespoons of dough onto the simmering soup, spacing them evenly apart. Cover pot tightly and simmer gently for 15 minutes without lifting the lid—dumplings will steam and cook through.
07 - Check dumplings for doneness; they should be puffed and cooked through in the center. Remove bay leaf. Taste and adjust seasoning as needed. Serve hot, garnished with additional fresh parsley.