For a richer flavor, sauté the onions and mushrooms in butter before adding them to the sauce. Feel free to add other vegetables like peas, carrots, or celery to the casserole for added nutrition and flavor. To freeze the casserole, assemble it in a freezer-safe dish, cover tightly with plastic wrap and foil, and freeze for up to 3 months. Thaw overnight in the refrigerator before baking. If you don't have buttery round crackers, Ritz crackers or even bread crumbs can be used as a substitute.
Hailey Walsh
Jun 27, 2025I added some frozen peas and carrots to the casserole, and it turned out great! Thanks for the inspiration.
Bettye Haley
Sep 11, 2024Freezing it ahead of time is such a great idea. It's perfect for when you know you'll have a crazy week.
Horacio Upton
Jan 1, 2024This recipe is a lifesaver! So easy to throw together on a busy weeknight, and the whole family loves it.
Andreane Williamson
Dec 4, 2023The buttery cracker topping is the best part! So crunchy and delicious.