Grandma’s Cozy Sunday Baked Chicken Casserole

There’s something about a warm chicken casserole coming out of the oven that instantly makes Sunday dinner feel special. I love making Grandma’s Sunday Baked Chicken Casserole because it has that comforting, homemade flavor I grew up associating with family meals around the table.

Tender chicken, creamy sauce, vegetables, and a golden, buttery topping come together in a dish that feels nostalgic without requiring hours in the kitchen. I especially appreciate how simple the ingredients are and how easily I can prepare everything ahead of time when the weekend gets busy.

It’s hearty enough to serve as the main meal, yet uncomplicated enough for any home cook to make confidently. For me, this is the kind of dependable comfort-food recipe that brings everyone to the table.

Why You’ll Love This Recipe

• Simple to Prepare: The casserole comes together with straightforward steps and everyday ingredients, making it approachable even for beginner cooks.
• Classic Comfort Flavor: Creamy chicken filling and a buttery, golden topping give every bite that cozy Sunday-dinner taste.
• Easy-to-Find Ingredients: There’s nothing complicated here—chicken, vegetables, pantry staples, and a few refrigerated ingredients do the work.
• Easy to Customize: Swap the vegetables, change the cheese, or use leftover turkey when you need a flexible family meal.
• Perfect for Family Dinners: It’s comforting enough for Sunday supper but practical enough for potlucks, holidays, and busy weeknights.

Grandma’s Cozy Sunday Baked Chicken Casserole

A warm and comforting baked chicken casserole filled with tender chicken, colorful vegetables, creamy sauce, and melted cheddar cheese. A buttery cracker topping bakes until golden and crisp, making this an easy family dinner with classic homemade flavor.

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Ingredients Method Notes

Ingredients

  

• 3 cups cooked chicken shredded or diced
• 1 can 10.5 ounces condensed cream of chicken soup
• 1/2 cup sour cream
• 1/2 cup chicken broth
• 1 1/2 cups frozen mixed vegetables thawed and drained
• 1 cup shredded cheddar cheese
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon dried thyme
• 1/4 teaspoon black pepper
• 1/4 teaspoon salt or to taste
• 1 cup crushed buttery crackers
• 3 tablespoons unsalted butter melted
• 2 tablespoons chopped fresh parsley optional

Method

 

1. Preheat the oven to 375°F. Lightly grease a 9-by-13-inch baking dish.
2. In a large mixing bowl, combine the cream of chicken soup, sour cream, and chicken broth until smooth.
3. Stir in the garlic powder, onion powder, thyme, black pepper, and salt.
4. Add the cooked chicken, thawed mixed vegetables, and shredded cheddar cheese. Stir gently until everything is evenly coated.
5. Spread the chicken mixture evenly in the prepared baking dish.
6. In a small bowl, combine the crushed buttery crackers with the melted butter until the crumbs are evenly coated.
7. Sprinkle the buttery cracker mixture evenly over the casserole.
8. Bake uncovered for 25–30 minutes, or until the filling is hot and bubbling around the edges and the topping is golden brown.
9. Remove from the oven and let the casserole rest for 5–10 minutes before serving. Garnish with fresh parsley, if desired.

Notes

• Store leftover casserole in an airtight container in the refrigerator for up to 3–4 days. Reheat individual portions in the microwave or warm larger portions in a covered baking dish in the oven.
• For a different flavor, substitute mozzarella, Monterey Jack, or Colby Jack for the cheddar. You can also replace the mixed vegetables with broccoli, peas, green beans, carrots, or a combination your family enjoys.
• Leftover turkey works well in place of chicken, making this casserole especially useful after a holiday meal. For the crispiest topping, store leftover cracker crumbs separately when possible and add fresh crumbs before reheating.

Pro Tips

1. Use cooked rotisserie chicken when you need a quick shortcut without sacrificing flavor.
2. Cut or shred the chicken into similar-sized pieces so it heats evenly throughout the casserole.
3. Thaw frozen vegetables before adding them to prevent excess water from thinning the filling.
4. Taste the filling before baking and adjust the seasoning as needed.
5. Spread the filling evenly in the baking dish so every serving gets plenty of chicken and vegetables.
6. Add the buttery cracker topping just before baking to help it stay crisp.
7. Let the casserole rest for 5–10 minutes after baking so the creamy filling can thicken slightly.
8. If the topping browns too quickly, loosely cover the dish with foil for the remaining baking time.

FAQs

Can I use leftover chicken?

Yes. Leftover roasted, grilled, or baked chicken works beautifully. Simply shred or dice it before mixing it into the casserole.

Can I prepare this casserole ahead of time?

Yes. Assemble the chicken filling, cover it, and refrigerate for up to 24 hours. Add the cracker topping just before baking for the best texture.

Can I use frozen vegetables?

Absolutely. Thaw them first and drain away any excess moisture before adding them to the filling.

What can I serve with chicken casserole?

A crisp green salad, roasted vegetables, steamed green beans, or warm dinner rolls all pair nicely with this rich and creamy casserole.

How do I know when the casserole is done?

It’s ready when the filling is bubbling around the edges, the center is hot, and the topping is golden brown. Since the chicken is already cooked, you’re mainly heating the casserole thoroughly and browning the top.