Melt butter in a large pot over medium heat.
Add onion, carrots, celery, and garlic and cook until softened.
Pour in chicken broth and bring to a gentle simmer.
Stir in shredded chicken, thyme, parsley, salt, and black pepper.
Add heavy cream and let the broth simmer for about 10 minutes.
In a bowl mix flour, baking powder, salt, milk, and melted butter to form dumpling dough.
Drop spoonfuls of dumpling dough into the simmering broth.
Cover and cook for about 12–15 minutes until dumplings are fluffy and cooked through.
Serve warm and enjoy.