01 - Heat a skillet over medium heat and add the ground beef. Cook, breaking apart with a spatula, until fully browned and no longer pink. Drain excess fat and set aside.
02 - Transfer the cooked beef to the slow cooker. Add the diced potatoes, onion, carrots, celery, and minced garlic to the pot.
03 - Sprinkle the flour, thyme, parsley, paprika, salt, and pepper over the ingredients. Stir thoroughly to coat everything evenly.
04 - Pour in the beef broth, ensuring all ingredients are submerged. Cover and cook on LOW for 6 hours or HIGH for 3-4 hours, until potatoes and vegetables are fork-tender.
05 - In a small bowl, whisk together the whole milk and softened cream cheese until completely smooth and no lumps remain.
06 - Pour the milk mixture into the slow cooker. Add the heavy cream and shredded cheddar cheese. Stir gently to incorporate.
07 - Cover and continue cooking on HIGH for an additional 20-30 minutes, until the soup reaches desired consistency and the cheese is fully melted.
08 - Taste the soup and adjust salt and pepper as needed. Ladle hot into bowls and garnish with fresh chives, extra cheese, or crumbled bacon if desired.