01 -
Add carrots, celery, onion, chicken, rice, broth, salt, thyme, rosemary, and garlic to crockpot. Cook on low for 6 hours.
02 -
Melt butter, sauté mushrooms 5-6 minutes until soft. Add flour and coat mushrooms.
03 -
Slowly whisk milk into mushroom mixture 1/2 cup at a time until thickened, about 4-5 minutes total.
04 -
Remove chicken from crockpot and shred into bite-size pieces.
05 -
Stir mushroom mixture into crockpot, return shredded chicken and combine well.