
This creamy chicken asparagus casserole celebrates spring's finest vegetable in a comforting dish that's perfect for family dinners. The combination of tender chicken, fresh asparagus, and egg noodles wrapped in a savory sour cream sauce creates layers of flavor that will have everyone asking for seconds.
I discovered this recipe during asparagus season last year when our local farmers market was overflowing with fresh spears. My family immediately declared it our official spring celebration dish, and now we look forward to making it as soon as the first asparagus appears.
Ingredients
- Egg noodles: Form the hearty base that soaks up all the delicious sauce
- Olive oil: For sautéing the vegetables to develop their flavors properly
- Yellow onion: Adds sweetness and aromatic foundation to the dish
- Cooked chicken: Provides lean protein and makes this a complete meal
- Red bell pepper: Contributes sweet crunch and beautiful color contrast
- Celery: Adds subtle flavor and pleasant texture throughout the casserole
- Chicken stock: Creates depth while keeping the casserole moist
- Sour cream: Transforms everything into a creamy delight without being heavy
- Dried oregano: Infuses Mediterranean flavor throughout the dish
- Fresh asparagus: Brings seasonal brightness and slight crunch
- Parmesan cheese: Creates an irresistible golden crust while adding umami flavor
Step-by-Step Instructions
- Preparation:
- Preheat your oven to 350°F and lightly grease a 1½-quart casserole dish. Gather and measure all ingredients before beginning to ensure smooth preparation. This step saves significant time during the cooking process.
- Cook the Noodles:
- Bring a large pot of lightly salted water to a rolling boil. Add egg noodles and cook for approximately 5 minutes until almost tender but still firm. They should be slightly underdone as they will continue cooking in the oven. Drain thoroughly to prevent excess liquid in your casserole.
- Create the Sauce Base:
- Heat olive oil in a large skillet over medium heat until shimmering. Add chopped onion and cook for 4 to 5 minutes, stirring frequently until translucent but not browned. The onions should become soft and aromatic as they release their natural sugars.
- Build the Filling:
- Add the cooked chicken, chopped red bell pepper, and celery to the onions. Pour in chicken stock and bring the mixture to a gentle boil. Reduce heat and simmer for 5 minutes to allow flavors to meld and vegetables to soften slightly. Remove from heat and carefully stir in sour cream and oregano until completely incorporated.
- Assemble the Casserole:
- Spread half of the chicken mixture into the prepared baking dish, creating an even layer. Arrange asparagus pieces in a single layer over the chicken mixture. This layering technique ensures the asparagus cooks perfectly while maintaining its vibrant color and texture.
- Add Noodles and Cheese:
- Distribute the cooked noodles evenly over the asparagus layer. Sprinkle 5 tablespoons of Parmesan cheese over the noodles. The cheese will melt into the noodles creating pockets of savory goodness.
- Final Assembly and Baking:
- Top with the remaining chicken mixture, spreading gently to ensure complete coverage. Sprinkle the remaining 3 tablespoons of Parmesan cheese over the top. Bake in the preheated oven for approximately 30 minutes until the cheese has melted and the top develops a beautiful golden brown crust.

The asparagus truly makes this dish special. I always look for bright green stalks with tight, compact tips when shopping. For years, this casserole has marked the beginning of spring in our household, and my children now recognize the arrival of asparagus season as casserole season.
Make Ahead Tips
This casserole works beautifully as a make-ahead meal. Prepare the entire dish up to the baking step, cover tightly with foil, and refrigerate for up to 24 hours. When ready to serve, remove from the refrigerator 30 minutes before baking to take the chill off, then bake as directed, adding an extra 10-15 minutes to the cooking time if still cold.
Customize Your Casserole
This versatile recipe welcomes many variations to suit your taste or pantry. Try using different pasta shapes like penne or rotini if egg noodles aren't available. For a vegetarian version, substitute the chicken with sautéed mushrooms and use vegetable broth instead of chicken stock. You can also add a cup of frozen peas or swap the red bell pepper for roasted red peppers from a jar for deeper flavor.
Selecting Perfect Asparagus
The quality of asparagus dramatically affects this dish. Look for stalks that are firm, straight, and have tightly closed tips. The thickness doesn't indicate quality but does affect cooking time. Thicker stalks work well in this casserole as they maintain texture during baking. Always trim the woody ends by bending each stalk until it naturally snaps, usually about an inch from the bottom.
What to Serve With It
This casserole pairs beautifully with a simple green salad dressed with lemon vinaigrette to balance the richness. For a more substantial meal, serve alongside crusty bread for soaking up the delicious sauce. During spring, complement with other seasonal vegetables like roasted radishes or fresh peas for a truly seasonal feast.

Frequently Asked Questions
- → Can I use a different vegetable instead of asparagus?
Yes, you can substitute asparagus with vegetables like broccoli, green beans, or zucchini for a variation in flavor and texture.
- → What type of noodles work best for this dish?
Egg noodles are recommended for their tender texture, but you can also use pasta shapes like penne, farfalle, or fusilli to suit your preference.
- → How can I make the dish spicier?
You can add salsa to the sour cream mixture or include diced jalapeños or red pepper flakes when cooking the chicken and vegetables.
- → Can I prepare this casserole in advance?
Yes, you can assemble the casserole up to a day ahead, store it in the refrigerator, and bake it just before serving.
- → Can I make this dish vegetarian?
To make it vegetarian, replace the chicken with a plant-based protein like tofu or chickpeas and use vegetarian stock instead of chicken stock.