For added vegetables, fold in cooked broccoli, peas, spinach, or mixed vegetables. Drain vegetables well to prevent a watery filling.

Monterey Jack, Colby Jack, mozzarella, or pepper Jack can replace some of the cheddar cheese.

Buttery breadcrumbs, crushed cornflakes, or another crisp cracker can be substituted for Ritz crackers.

Dried parsley, paprika, or Italian seasoning can be added to the topping for extra flavor.

Cooked rice or pasta can be mixed into the filling for a heartier casserole; add extra soup or sour cream as needed to maintain a creamy consistency.

For make-ahead preparation, refrigerate the assembled chicken filling and add the buttered crackers and remaining cheese just before baking.

Store leftovers covered or in an airtight container in the refrigerator for up to 3–4 days.

Reheat individual portions in the microwave, or cover loosely with foil and reheat at 350°F (175°C) in the oven. Remove the foil near the end to help crisp the topping.

For best freezing results, freeze the creamy chicken filling without the cracker topping, then add freshly buttered crackers and cheese before baking.

Serve with green beans, roasted broccoli, asparagus, salad, roasted vegetables, rice, mashed potatoes, or dinner rolls.