Add onions, celery, carrots, broth, and beer to the bowl of a slow cooker.
Add in garlic, Worcestershire sauce, and melted butter.
Slow cook on low for 4-6 hours.
Using a hand blender (or transfer contents to a regular blender) and blend until smooth.
Place back in slow cooker and add in cream cheese, and shredded cheddar cheese. Stir to combine and melt the cheese.
In a small bowl, combine the evaporated milk and cornstarch. Stir to combine and make a "slurry."
Slowly pour slurry into the soup. Stir and continue to cook on low for another 10-15 minutes.
Stir in the paprika and season with salt and pepper to taste.
Serve warm, garnished with green onions, croutons, or more shredded cheese.
Enjoy warm!