Cheesy Chicken Broccoli Casserole

Ingredients â–¢3 cups chopped broccoli â–¢1 ½ cups cooked, chopped chicken â–¢2 cups shredded cheddar â–¢10 ounces cream of chicken soup â–¢1 cup sour cream â–¢1 teaspoon salt â–¢1/2 teaspoon cracked pepper â–¢4 tablespoons butter â–¢12 ounces Stove …