
Creamy Rotel Chicken Spaghetti Casserole is an absolute crowd pleaser in my home and a delicious way to bring together comfort and just a hint of spice. You end up with melty cheddar, savory chicken, and that gentle kick of Rotel making it a surefire hit for both family nights and gatherings. Every time I make this recipe, there are never any leftovers.
The first time I served this at a holiday potluck it vanished before any other dish. It is genuinely requested on repeat by both kids and adults.
Ingredients
- Spaghetti: provides a satisfying and familiar pasta base aim for not overcooking to prevent sogginess
- Cooked shredded chicken: brings tender protein rotisserie chicken saves even more time and is super flavorful
- Rotel diced tomatoes with green chilies: infuses the casserole with Southwestern spice and brightness always drain well to avoid watery sauce
- Cream of chicken soup: creates the creamy rich sauce choose a quality brand for best flavor
- Sour cream: gives tanginess and helps form a silky texture use full fat for best consistency
- Shredded cheddar cheese: melts beautifully across the top sharp cheese brings more depth
- Garlic powder: adds a punch of flavor source for fresh ground if possible for better aroma
- Onion powder: balances flavor with sweet mild notes essential for casserole depth
- Salt and pepper: create harmony make sure to taste and adjust as you go
- Chopped parsley: brightens finish and brings color fresh parsley makes a difference but dried works in a pinch
Step-by-Step Instructions
- Prepare the Foundation:
- Set your oven to a true 350 degrees and grease a large baking dish. Boil spaghetti in generously salted water only until it holds its shape then drain it carefully so the casserole does not become mushy.
- Create the Sauce Mixture:
- In your biggest mixing bowl whisk together cream of chicken soup with the sour cream so it is completely smooth. Stir in drained Rotel garlic powder onion powder salt and pepper making sure everything is evenly blended for an ultra creamy base.
- Combine Main Components:
- Add the cooked spaghetti right into that bowl along with the chicken. Toss everything so every strand is coated with sauce. The goal is for no dry bits of pasta or chicken.
- Assemble the Casserole:
- Gently scoop the coated ingredients into your prepared dish. Spread it out flat so every bite bakes evenly. Scatter shredded cheddar cheese evenly across the surface aiming to cover every spot to get that gorgeous golden crust.
- Bake to Bubbly Perfection:
- Place the dish in the oven uncovered. Let it bake until the cheese is fully melted and the edges are just starting to bubble and brown this usually takes around twenty five minutes. Do not overbake or the cheese can dry out.
- Garnish and Serve:
- When the casserole comes out of the oven let it sit for a few minutes to finish setting up. Sprinkle freshly chopped parsley over the top for a burst of fresh flavor and extra color. Serve while piping hot.

Cheddar cheese is my personal favorite ingredient here because it adds so much richness. My sister says this was the one dish she looked forward to at every birthday party I hosted.
Storage Tips
Keep leftovers in a well sealed lidded container in the refrigerator for up to three days. For best quality reheat individual servings in the microwave or rewarm the whole dish gently in the oven covered until hot all the way through. If freezing cut into individual squares wrap in foil and store in freezer safe bags for up to two months.
Ingredient Substitutions
Swap out the chicken for leftover turkey during the holidays. If you want to sneak in vegetables stir in a handful of frozen peas or some chopped spinach before baking. You can also use Monterey Jack or Pepper Jack cheese if you want some extra kick without changing the creamy texture.
Serving Suggestions
Serve with a crisp green salad or some steamed broccoli for a balanced meal. Garlic bread is always a hit alongside this casserole. For potluck parties slice into squares and use a spatula to serve neat portions.

Cultural and Historical Context
Rotel tomatoes are a Southern pantry staple and their blend with green chilies dates back decades in Tex Mex cooking. Classic chicken spaghetti casseroles have been part of American family dinners since the early days of convenience foods. This version keeps the creamy comfort but brings new flavor and zing.
Frequently Asked Questions
- → Can I use any kind of pasta?
Spaghetti is traditional here, but you could easily substitute linguine or fettuccine for similar results.
- → Is Rotel necessary, or can I use regular tomatoes?
Rotel provides a unique flavor and mild heat, but you can use diced tomatoes with a pinch of green chilies as an alternative.
- → How can I make this dish spicier?
Use extra hot Rotel or add a pinch of crushed red pepper flakes to the sauce mixture before baking.
- → Can leftovers be reheated?
Yes—simply reheat portions in the microwave or cover and warm in the oven until heated through and the cheese is melty again.
- → Can I make it ahead of time?
Assemble everything in the dish, cover, and refrigerate for up to a day. Add a few minutes to your bake time if starting cold.