For me, this dish is one of the most comfort food picks in any season. A yellow casserole with chicken and squash makes a full meal, especially when adding leftover pieces into a mix of combined onions and a tasty cheese sauce—simple, flavorful, and comforting.
Even my daughter, who is not really fond, but was pulled in by the aromas of a well-seasoned bake that caught his interest. At dinner, he enjoyed it with a side of crusty bread and a tossed salad that will complete your menu.
Chicken and Squash Casserole-The Short Answer
Ingredients
I plan this dish around Serves and Servings (6 to 8) and keep the Ingredients simple and clear.
- Chicken Breast (1.5 pound / lbs) cooked in Butter (Salted, about 2 to 4 tablespoons / tbsp)
- Yellow Squash (5 sliced into 1/4 inch slices) with Onion (1 to 2 medium chopped or diced)
- Garlic Cloves (2 minced) with Fresh thyme (1 teaspoon), parsley sprigs (2 to 3), and bay leaf (1) with extra leaves (Optional)
- carrots (1/3 to 2/3 cup shredded) for a small personal touch
For the creamy base:
- Eggs (2 to 3 beaten yolks)
- milk or Half and Half (1 cup from a carton, more if needed)
- sour cream (10 to 14 ounce / oz) or mushroom soup (1 carton) with light broth (2/3 cup)
- Cheddar or Gruyere cheese (14 to 16 ounce / oz shredded)
For topping and structure:
- Ritz Crackers (45 crushed) or bread crumbs (1/2 cup) or stuffing mix (2/3 cup dry) with melted butter (2 tablespoons)
- all-purpose flour (2 tablespoons) if needed
For flavor:
- Salt (1 teaspoon) with Black pepper (1/2 teaspoon)
- cayenne (1/8 teaspoon) and nutmeg (1/4 teaspoon)
- Worcestershire sauce (1 teaspoon)
I adjust taste and flavor depending on medium or large batches so everything blends smoothly and cooks evenly.
Step By Step Instructions
Cooking the Chicken and Veggies
- In a skillet over medium heat, add tablespoons of melted butter and sauté the chicken, making sure to flip halfway so it cooks evenly to internal temp 165F.
- Let it cool, then remove and shred into shredded pieces, setting the bone aside.
- Keep the leftover juices, then continue sautéing squash, sweet onion, and garlic until softened and fragrant—this always adds depth in my experience.
Making the Sauce and Base
- In a saucepan or Dutch pot, bring cups of salted water to a boil with parsley, thyme, and bay leaf until vegetables are fork-tender.
- Drain, discard sprigs, and press extra liquid, then return to heat, melt butter, add flour, and stir out lumps until it bubbles.
- Gradually add milk so the sauce thickens, then drizzle into egg yolks to avoid curdling, repeat, and finish smooth and warmed.
- Add Gruyère, cayenne, Worcestershire, nutmeg, and season with salt and pepper.
Assembling the Casserole
- Preheat the oven to 350 degrees F (175 C) or 400F, grease a baking dish (9×13) and set it aside.
- In a bowl, combine chicken, veggies, broth, soup, sour cream, eggs, half cheese, and crackers, adding tbsp butter, then mix until combined.
- Transfer the mixture into the dish, making sure it’s well-drained and prepared, and use a spoon to spread so it fully coats—something I’ve learned improves texture.
Topping and Baking
- Top with remaining cheese and cracker crumbs, cut butter into cubes, and randomly place over the cheesy crust.
- Add bread crumbs and stuffing, then sprinkle lightly.
- Bake for 25 minutes until golden, browned, and bubbly, then let it rest for cooling, serve, and garnish with chopped parsley—I always notice how evenly it turns perfectly baked this way.
Pro Tips
Cooking
- When you have enough liquid from sautéing chicken with butter, just add a splash of stock—you want the veggies to steam so they can soften into a rich casserole texture.
- I usually prefer cheddar cheese, but honestly use whatever you enjoy most—Monterey Jack tastes nice, while Pepper adds a spicy extra kick.
Finishing
- At the end, I’ve sprinkled mine with a little fresh parsley on hand—not a mandatory ingredient, but it does make a pretty presentation.
- You could also sprinkle leftover thyme.
- For best results, boiling and draining squash prevents a runny dish.
- Try Swiss if no Gruyère; zucchini would be just fine instead of yellow.
Nutrition
When I cook this, I always check Nutrition, Facts per serving—about 398 Calories, with 24g Fat, 22g Carbs, and 24g Protein—it’s filling but still manageable. The full Nutrition Facts show Servings Per Recipe as 6, Calories 398, and % Daily Value like Total Fat 24g 31%, Saturated Fat 12g 62%, Cholesterol 153mg 51%, and Sodium 445mg 19%, which helps me portion things better at home.
- Total Carbohydrate 22g 8%, Dietary Fiber 3g 11%, Total Sugars 8g
- Protein 24g 48%, plus Vitamin C 48mg 53%, Calcium 340mg 26%, Iron 3mg 17%, Potassium 732mg 16%
I’ve learned these Percent Daily Values are based on a 2,000 calorie diet, but daily values can be higher or lower depending on your calorie needs. Sometimes, Nutrient information is not fully available for all ingredients, and the Amount is based on available nutrient data. So if Information is not currently available for a nutrient, and you’re on a medically restrictive diet, I’d always consult a doctor or registered dietitian before preparing this recipe for personal consumption.
My Best Homemade Recipes
If you enjoyed this chicken and squash casserole, try more easy meals like Dump and Bake Chicken Alfredo: 1 Pan, 10-Min Prep and Slow Cooker Chicken Taco Soup (8 Ingredients, 326 Cal) for quick and satisfying options.
For more creamy and comforting dishes, explore Crack Chicken Crock Pot (5 Simple Ingredients Only), Tuscan Chicken Crockpot (Creamy, Dump & Go Easy!), and Homemade Swiss Chicken Stuffing Casserole Recipe to keep your dinners simple and delicious.
