In a large pot, combine potatoes, chicken broth, onion, garlic, thyme, black pepper, and salt. Bring to a boil over high heat, then reduce heat to medium-low and simmer for 20 minutes or until potatoes are tender.
In a separate pot, melt butter over medium heat. Add flour and stir until smooth. Slowly add milk, stirring constantly. Cook until thick and bubbly, about 5 minutes.
Add cheese to the milk mixture and stir until melted. Add the cheese sauce to the potato mixture and stir until combined.
Continue to cook over medium heat until heated through. Serve warm.
Interesting Facts
This soup is best served immediately, but can be stored in the refrigerator for up to 3 days.
Potatoes are a good source of vitamin C, potassium, and dietary fiber.
Cheddar cheese is a good source of protein and calcium.