When you need a filling dinner that doesn’t feel like the same old thing, this creamy chicken spaghetti bake is exactly what you’re looking for. It’s cheesy, comforting, and comes together faster than you’d think, perfect for those nights when you want something special without all the fuss.
The magic here is in the combination of tender pasta, shredded chicken, and a silky sauce that bakes up bubbly and golden. Plus, there’s a secret ingredient that makes everyone ask for the recipe: jarred pimentos add just the right amount of tang and color.
Simple Ingredients
This casserole comes together with everyday ingredients you probably already have on hand. The beauty is that there’s no need to brown or fuss with the chicken, you’re simply mixing everything together and letting the oven do the work.
- Chicken breasts (cooked and shredded), You can boil them fresh or grab a rotisserie chicken from the grocery store to save time. Either way, just shred it into bite-sized pieces.
- Spaghetti broken into thirds, Breaking the pasta into shorter pieces makes it easier to eat and helps it distribute evenly throughout the casserole. Cook it just shy of done so it doesn’t get mushy in the oven.
- Cream soups (mushroom and chicken), These create the creamy base without any need for making a sauce from scratch. They blend beautifully with the broth to coat every bite.
- Jarred pimentos, This is the secret ingredient that gives the dish a subtle sweetness and slight tang. Don’t skip them, they really do make a difference.
Making Creamy Chicken Spaghetti Bake, Step by Step
Here’s how to build this casserole step by step:
Step 1: Prep and Cook the Pasta
Break your spaghetti into thirds and cook it according to the package directions, but stop one minute early. You want it to have a little bite to it since it’ll finish cooking in the oven.
Step 2: Heat Your Oven
While the pasta cooks, preheat your oven to 350°F. This gives it time to reach the right temperature while you’re mixing everything together.
Step 3: Mix Everything Together
In a large bowl, combine the cooked pasta, shredded chicken, both cream soups, chicken broth, bell peppers, onion, garlic, pimentos, one cup of the cheddar cheese, cayenne pepper, salt, and pepper. Stir until everything is evenly coated and mixed.
Step 4: Assemble in the Baking Dish
Pour the entire mixture into a 9×13-inch casserole dish and spread it out evenly. Sprinkle the remaining half cup of cheddar cheese over the top in an even layer.
Step 5: Bake Until Bubbly
Bake uncovered for 30 minutes, or until the cheese is melted and the edges are bubbling. If the cheese starts browning too quickly, just tent it loosely with foil for the remaining time.
Swaps and Substitutions
- If you don’t have pimentos, use roasted red peppers from a jar for a similar sweet, tangy element.
- Any small pasta shape works, penne, rigatoni, or even egg noodles are delicious here.
- Swap the cream soups for a homemade béchamel sauce if you prefer to avoid canned ingredients.
- Use turkey or rotisserie chicken instead of regular chicken breasts for variety.
Serve It With
- Serve alongside a fresh green salad with a tangy vinaigrette to balance the richness of the casserole.
- Pair with roasted or air-fried vegetables like Brussels sprouts or green beans for added nutrition.
- Add a simple tomato and cucumber salad on the side for a light, refreshing contrast.
- Serve with garlic bread or a crusty roll to soak up every bit of that creamy sauce.
- More Chicken Dinners to round out the menu
How to Store Leftovers
Store
Keep leftovers in an airtight container in the refrigerator for up to 3 days. It reheats beautifully and actually tastes better the next day as flavors meld together.
Freeze
Freeze the unbaked casserole by covering it tightly with plastic wrap and foil, it’ll keep for up to 4 months. You can also freeze cooked leftovers in an airtight container for the same amount of time.
Reheat
Thaw overnight in the fridge if frozen, then bake at 350°F for 20-25 minutes until heated through. Cooked leftovers can go straight from fridge to a 325°F oven for about 15 minutes.
For more on safe storage, see the USDA chicken food-safety guidelines.
Ways to Switch It Up
- Add sautéed mushrooms or spinach to the mixture for extra vegetables and nutrition.
- Swap the cheddar for a blend of mozzarella and parmesan for a different flavor profile.
- Stir in a handful of crispy bacon pieces or diced ham for a smoky twist.
- Use half cream of chicken soup and half cream of broccoli soup for added veggie content.
Why You'll Love This Recipe
- One-dish dinner that’s ready in under an hour from start to finish
- Uses simple pantry staples and cooked chicken for zero stress
- Freezes beautifully before or after baking for meal-prep friendly cooking
- Feeds a crowd and tastes even better as leftovers
- Creamy and satisfying without any complicated techniques
Tips for the Best Results
- Check your pasta one minute before the package time suggests, you’re aiming for about 90% cooked so the final 10% happens in the oven.
- Chop your bell peppers, onion, and garlic as small as you can so they cook through and distribute evenly throughout the dish.
- Taste the mixture before it goes in the oven and adjust the salt and pepper to your liking, seasoning it now is easier than trying to fix it later.
- If the top cheese is browning too fast before the 30 minutes are up, simply cover the dish loosely with foil to protect it.
- This dish is forgiving, if you like more veggies, add them; if you prefer extra cheese, go for it. Make it your own.
More Easy Recipes
- Garlic Butter Chicken That’ll Make You Swoon
- Creamy Cajun Chicken and Broccoli Alfredo
- Creamy Chicken Alfredo Bake
Creamy Chicken Spaghetti Bake
Ingredients
Equipment
Method
- Break spaghetti into thirds and cook according to package instructions, minus one minute. You want it to have a bit of a bite to it.
- Preheat the oven to 350 F. In a large bowl, combine the cooked spaghetti and all the ingredients, except ½ cup of shredded cheddar cheese.
- Spoon mixture into a 9 x 13-inch casserole dish and sprinkle the remaining ½ cup shredded cheddar on top. Bake for 30 minutes until the cheese is melted and bubbly.
