Yield: 6 servings
Combine broth, potatoes, onion, celery, flour, salt and pepper in slow cooker; mix well. Cover; cook on LOW for 6-7 hours. Stir in half and half; cover and cook for 1 hour.
Slightly crush potato mixture with potato masher. Continue to cook, uncovered, an additional 30 minutes until slightly thickened. Just before serving, stir in butter and parsley.
Please note that some ingredients and brands may not be available in every store.