This Simple Chicken Spaghetti Recipe in the Slow Cooker is the ultimate solution for a family-friendly meal. With creamy sauce, tomatoes and chilies, and flavorful shredded chicken, dinnertime can’t come soon enough!

Simple Chicken Spaghetti in the Slow Cooker served and garnished on green plate next to fork

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What I Love About This Recipe

If you need to switch up your pasta routine, simple chicken spaghetti is the perfect one-pot meal that even the pickiest eaters will devour. This is the best chicken spaghetti recipe because:

It’s a budget-friendly meal for 4-6 hearty servings. It checks all the boxes for protein, carbs, and cheesy goodness!
It’s not spicy, but the tomatoes and chilies give a little extra flavor kick.
You can adjust the ingredients to your liking – leave out tomatoes, or swap the spaghetti for penne or gluten-free spaghetti noodles.
It’s a variation from classic spaghetti and meatballs.
It doesn’t have to cook all day. Start it at lunchtime and you’ll have an amazing meal ready for dinner!

Ingredients Needed

Butter – The browned butter and seasoning mixture really sets it apart from other spaghetti recipes. It’s delightfully rich and not greasy at all!
Garlic – Jarred minced garlic is super easy for slow cooker recipes. Browning it with the butter is the simplest extra step that adds so much flavor!
Seasonings – Just two extra seasonings add to the tastiness of this recipe – dried rubbed sage and salt. Sage is an herb that complements poultry dishes and dried rubbed sage is a coarser variety that deeply flavors the overall base of the chicken spaghetti.
Boneless skinless chicken breasts – I used two thawed chicken breasts, but I’ve also tried boneless skinless chicken thighs. Either can work!
Diced tomatoes with green chilies – Not all chicken spaghetti recipes use tomatoes and green chilies, but I like the added flavor of the combination. You can leave them out if you prefer, or just use plain diced tomatoes.
Chicken broth – I like to use bone broth in the slow cooker for the added nutrients, but you can use regular or unsalted as well.
Heavy cream – This is essential to developing the rich, creamy sauce that coats the noodles.
Shredded parmesan cheese – Shredded parmesan works well for slow cooker dishes because it melts easily and adds a complex layer of flavor. Add some extra on top of your finished dish!
Spaghetti noodles – Use 12 ounces of regular spaghetti noodles or penne noodles (although those may take a bit longer to cook). You can also swap gluten-free noodles and reduce the broth by ¼ cup, but be sure to monitor the cooking time since it will be slightly shorter. I used gluten-free noodles made from a whole-grain rice blend.

Grass fed butter, salt, garlic, and seasonings in small bowls

Chicken sipping bone broth 32 fl ox bottle and 2 large chicken breasts

How To Make Simple Chicken Spaghetti In The Slow Cooker

Heat a skillet to medium-high heat.
Cut the butter into 1 tablespoon pieces and add to the skillet.
Let the butter melt until it starts to bubble, then begin to whisk it.
Add garlic, sage, and salt to the butter. Continue whisking until the bubbles dissipate and the butter starts to develop brown specks and takes on a nutty aroma.
Remove the skillet from the heat and continue to whisk for 1-2 more minutes while it cools.

Add butter to the slow cooker along with chicken breasts, broth, and a can of diced tomatoes and chilies.
Cover and cook on low for 6-8 hours or high for 3-4 hours until the chicken is fully cooked.

Seasoned butter with garlic and seasonings in slow cooker with two chicken breasts inside

Seasoned butter with garlic and seasonings in slow cooker with two chicken breasts and diced tomatoes with chiles on top

Remove the chicken from the slow cooker and shred it with two forks.
Add heavy cream, spaghetti noodles, and parmesan cheese to the slow cooker and press the noodles into the liquid until they are fully covered and start to soften.

Seasoned butter mixture with uncooked spaghetti inside of slow cooker

Return the chicken to the slow cooker and give everything a stir to combine.
Turn the slow cooker to high and continue to cook for 30-40 minutes (stirring 2-3 times throughout) until the pasta is cooked to al dente.
Serve with an extra sprinkle of parmesan cheese and parsley or as desired.

Simple Chicken Spaghetti in the Slow Cooker

What To Serve With Simple Chicken Spaghetti

With this simple chicken spaghetti recipe, you can keep the rest of the meal simple and delicious, too!

Serve a side of Caesar salad or mixed greens with fresh veggies and mix up an Easy Homemade Italian Dressing. Warm up your favorite breadsticks or rolls or toast some homemade croutons. While the pasta is cooking, sauté some carrots with honey for a sweet veggie side.

Top off chicken spaghetti with extra shredded parmesan cheese, cheddar cheese, or an Italian blend. Add some fresh chopped parsley if you like!

Storing and Reheating

Portion chicken spaghetti into airtight containers and save for leftovers throughout the week! Store in the fridge for up to 3 days. Reheat in the microwave.

Because of the dairy and pasta combination, I don’t recommend freezing leftovers.

If you’d like to prep a few extra steps before dinner, melt and cool the butter and seasoning mixture and combine it with uncooked chicken and broth in a freezer bag. Store in the freezer for up to 3 months and defrost before continuing slow cooker directions.