In a slow cooker, add the broth, water, rice mix along with seasonings from seasoning packet, carrots, and celery. Stir to combine.
Cook on low for 6-8 hours.
When soup is almost ready, melt the butter in a sauce pan. Add the flour, salt, and pepper, to the butter and whisk together. Cook for a minute or two until the mixture begins to turn golden brown.
Slowly whisk the milk into the flour mixture until smooth and well combined. Stir the mixture into the soup in the slow cooker until well combined.
Add the turkey or chicken to the slow cooker and stir to combine. Cover and cook for 5-10 more minutes until the turkey or chicken is heated through. Serves 8.
Notes
For a broth type soup, you can skip making the cream mixture and just and the turkey or chicken.