Chicken spaghetti is a creamy baked pasta filled with tender chicken, tomatoes and green chiles, queso blanco, cheddar, mozzarella, and a crisp fried-onion topping. The sauce comes together on the stovetop while the pasta cooks, then the casserole needs only 15 minutes in the oven.
Breaking the spaghetti before boiling makes the finished casserole easier to mix and serve. Cooking it 2 minutes short of al dente prevents it from becoming soft as it finishes in the hot cheese sauce.
Ingredients for Chicken Spaghetti
Use 1 pound spaghetti and 3 cups cooked chicken. The creamy sauce needs 2 cups milk, two 10.5-ounce cans cream of chicken soup, one 10-ounce can Rotel tomatoes and green chiles, 8 ounces queso blanco Velveeta, 1/2 cup mozzarella, 1/4 cup sour cream, and 1/2 cup of the cheddar.
Reserve another 1/2 cup cheddar for the top, giving 1 cup cheddar in total. Add 3 to 4 tablespoons fried onions and season the sauce with salt, black pepper, garlic powder, and onion powder to taste.
If you enjoy this recipe, you may also like Chicken Parmesan with Fettuccine Alfredo.
How to Make Chicken Spaghetti
- Preheat the oven. Set it to 350°F and lightly grease a 9-by-13-inch baking dish.
- Cook the spaghetti. Break the noodles into shorter lengths and boil them in salted water for 2 minutes less than the package's al dente time. Drain well.
- Start the sauce. In a large pot over medium heat, combine milk, cream of chicken soup, Rotel, queso blanco, 1/2 cup cheddar, mozzarella, and sour cream.
- Melt the cheese. Stir until the queso is melted and the sauce is smooth, keeping the heat moderate so the dairy does not scorch.
- Season. Add salt, pepper, garlic powder, and onion powder to taste.
- Add chicken and pasta. Fold in the 3 cups cooked chicken and drained spaghetti until everything is evenly coated.
- Assemble. Spread the mixture in the prepared 9-by-13-inch dish.
- Add the topping. Scatter the reserved 1/2 cup cheddar and 3 to 4 tablespoons fried onions over the surface.
- Bake. Cook for 15 minutes, until the center is hot and the cheese is melted. Rest briefly before serving.
For storage details after serving, the USDA leftovers and food safety guidance.
Use Fully Cooked Chicken
Rotisserie chicken, poached chicken breasts, or leftover roasted chicken all work. Remove bones and skin, then shred or chop the meat into bite-size pieces. A combination of light and dark meat gives the casserole good flavor while staying moist.
The chicken must already be cooked because the casserole spends only 15 minutes in the oven. Measure 3 cups after shredding. Very large chunks make the pasta harder to portion, while finely shredded chicken distributes evenly through the sauce.
If you enjoy this recipe, you may also like White Chicken Lasagna Soup.
Undercook the Spaghetti Slightly
Break the dry spaghetti into shorter pieces before lowering it into boiling salted water. Shorter noodles are easier to fold through a thick sauce and do not drag other ingredients out of the serving dish.
Drain the pasta 2 minutes before the package's stated al dente time. It continues to absorb moisture in the sauce and oven. Do not rinse it; a small amount of surface starch helps the creamy sauce cling instead of sliding to the bottom of the casserole.
Build a Smooth Queso Sauce
Cut the queso blanco Velveeta into small cubes so it melts at the same pace. Combine it with milk, cream of chicken soup, Rotel, mozzarella, sour cream, and the first 1/2 cup cheddar in a pot large enough to hold the pasta later.
Stir from the bottom and around the sides until no firm queso pieces remain. Rotel adds both tomato and green-chile flavor; include its liquid so the sauce has enough moisture for a full pound of spaghetti. Taste only after the cheeses melt, then adjust the salt, pepper, garlic powder, and onion powder.
Combine without Crushing the Pasta
Add cooked chicken to the sauce first so it warms and becomes evenly coated. Fold in the drained spaghetti a portion at a time with tongs or a broad spoon. Gentle turning keeps the strands intact and prevents dense clumps.
The mixture should look creamy and slightly loose before it goes into the baking dish. Pasta absorbs more sauce in the oven and as it rests. If it already looks dry, stir in a small splash of milk before spreading it evenly in the pan.
Add the Crunchy Topping at the End
Reserve 1/2 cup cheddar specifically for the top, then distribute the fried onions over it. Keeping the onions at the surface gives them direct oven heat and preserves their crunch. Burying them in the sauce makes them soft.
Bake at 350°F for about 15 minutes. The ingredients are already cooked, so the goal is a steaming-hot center and melted topping rather than a long bake. If the onions darken too quickly, tent the dish loosely with foil.
Troubleshooting
- Soft noodles: Drain spaghetti 2 minutes before al dente because it continues cooking in the oven.
- Thick or dry casserole: Keep the Rotel liquid and add a splash of milk before baking if needed.
- Grainy sauce: Use moderate heat and stir until the queso melts without boiling.
- Uneven seasoning: Taste the fully melted sauce before adding salt and spices.
- Soft fried onions: Add them only on top immediately before baking.
Serving, Storage, and Reheating
This recipe makes eight servings. Pair it with a simple green salad, roasted broccoli, green beans, or another fresh vegetable that balances the creamy sauce. Let the casserole stand for about 5 minutes before serving so portions hold together more neatly.
Refrigerate cooled leftovers in an airtight container for up to 3 days. Reheat covered in a 350°F oven or microwave individual portions until hot throughout. A spoonful of milk stirred into a serving before reheating helps restore the sauce. Add fresh fried onions afterward if you want the topping crisp again.
Conclusion
Cook broken spaghetti 2 minutes short of al dente. Melt milk, cream of chicken soup, Rotel, queso blanco, cheddar, mozzarella, and sour cream into a smooth sauce, fold in cooked chicken and pasta, then bake with cheddar and fried onions at 350°F for 15 minutes.
Frequently Asked Questions
- → Can I use rotisserie chicken in chicken spaghetti?
Yes. Remove the skin and bones, then shred or chop 3 cups of fully cooked meat.
- → Should I drain the Rotel?
No. Its liquid helps loosen the cheese sauce and provides moisture for the pasta.
- → Why is the spaghetti undercooked before baking?
It continues to soften in the hot sauce and oven, so draining it 2 minutes early prevents mushy noodles.
- → How long do leftovers keep?
Store cooled chicken spaghetti airtight in the refrigerator for up to 3 days.