01 - Heat a skillet over medium heat. Add the lean ground beef and cook until fully browned, breaking it apart as it cooks. Drain any excess fat and set aside.
02 - Transfer the cooked beef to the slow cooker. Add the diced potatoes, onion, carrots, celery, and minced garlic.
03 - Sprinkle the flour, dried thyme, dried parsley, paprika, salt, and black pepper over the ingredients. Stir thoroughly to evenly distribute the seasonings.
04 - Pour in the beef broth. Cover the slow cooker and cook on LOW setting for 6 hours or HIGH for 3-4 hours, until potatoes and vegetables are tender.
05 - In a small bowl, whisk together the whole milk and softened cream cheese until completely smooth and well combined.
06 - Stir the milk mixture into the slow cooker along with the heavy cream and shredded cheddar cheese. Cover and cook on HIGH for an additional 20-30 minutes until the soup thickens and becomes creamy.
07 - Taste the soup and adjust salt and pepper if needed. Serve hot, garnished with fresh chives, extra cheddar cheese, or crumbled bacon if desired.