Start by dicing onion, carrots, celery and garlic.
Heat butter in an 8 quart dutch oven over medium heat.
Add the onions, carrots, celery and garlic to the pot and stir until onions are translucent.
Add the chicken broth, chicken, peas, thyme, rosemary, salt and pepper.
Cover and lower temperature to medium low. Simmer the soup for 25 minutes.
Remove the chicken breasts from the pot and shred with a fork. Return shredded chicken to the soup.
Dumplings
In a large mixing bowl, combine the flour, baking powder, milk, melted butter, salt and pepper.
Mix until all flour is absorbed.
Final Steps
Remove the lid from dutch oven and add the heavy cream. Mix to combine the cream into the soup.
Scoop the dumpling dough into the soup in roughly 1 tablespoon portions, spreading them out throughout the pot.
Return the lid to pot and cook on low for 20 minutes. Do not remove lid while dumplings are cooking. This step is steaming the dough to make the dumplings fluffy.
Remove the lid and gently separate dumplings from each other.
Serve immediately. Fill each bowl with a generous portion of soup with a few dumplings.