To a large pot, add butter over medium-high heat.
Once butter is bubbly and melted, add onion, carrots and celery. Saute about 5-10 minutes until slightly tender.
To the same pot, add chicken broth, thyme, bay leaves and parsley. Bring to a simmer.
Cover and simmer 15-20 minutes.
Add diced chicken. Cover again and simmer another 10 minutes, or until vegetables are very tender.
Add noodles, cover, and cook long enough for them to become al dente, or soft, but with a bite. Remove bay leaves before serving. Taste to see if it needs more salt. Enjoy!