Broccoli Cheese and Potato Soup

Ingredients (10)

• 1 tablespoon butter
• 1 medium yellow onion , chopped
• 3 large white potatoes , cubed, about 4 cups
• 4 cups chicken broth
• 1/2 teaspoon kosher salt
• 6 cups broccoli florets*
• 3 cups whole milk
• 3 cups shredded medium cheddar cheese
• 2 tablespoons flour
• 1 teaspoon freshly ground black pepper