Amish Potato Soup

Combine potatoes, water, carrot, onion, chicken base, and salt in a 6-quart soup pot over medium heat. Cook until potatoes are tender, about 20 minutes. Stir in 1 cup milk.

Stir sour cream and flour together in a small bowl until blended; mix in remaining 1 cup milk. Add to the soup along with the ham, reduce heat to low, and cook, stirring occasionally, until soup thickens, 30 to 45 minutes. Stir in cheese cubes and parsley and cook until melted and thick, about 10 more minutes.