Best Cream Of Broccoli Soup

Ingredients (8)

• ✓ 5 tablespoons butter, divided
• + 1 onion, chopped add to pantry
• ✓ 1 stalk celery, chopped
• + 3 cups chicken broth add to pantry
• + 8 cups broccoli florets add to pantry
• + 3 tablespoons all-purpose flour add to pantry
• + 2 cups milk add to pantry
• ✓ ground black pepper to taste