Place broccoli florets, chicken broth, and garlic powder into a slow cooker.
Cook on low for 3-4 hours, or until broccoli is tender.
Stir in heavy cream, shredded cheddar cheese, salt, and pepper. Cook for an additional 15-30 minutes, or until cheese is melted and soup is heated through.
Serve hot.
Notes
Optional: Garnish with extra cheddar cheese or croutons before serving.