Slow Cooker Creamy Chicken Noodle Casserole

Why I’ll Love This Recipe

I love how effortless this recipe is because the slow cooker does most of the work for me. The homemade creamy sauce is rich without being overly heavy, while the chicken becomes incredibly tender after hours of slow cooking. I also appreciate that it includes vegetables, protein, and pasta all in one pot, making it a complete meal with minimal cleanup. Whether I’m preparing dinner for my family or planning meals ahead, this recipe always turns out comforting and delicious.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

• 1½ lbs boneless skinless chicken breasts (about 3 medium)
• 3 tablespoons unsalted butter
• 1 medium yellow onion, diced
• 3 cloves garlic, minced
• 1/3 cup all-purpose flour
• 2 cups low-sodium chicken broth
• 1 cup whole milk
• 1 cup heavy cream
• 1/2 teaspoon dried thyme
• 1/2 teaspoon dried rosemary
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 2 cups frozen mixed vegetables (peas, carrots, corn, green beans)
• 8 oz (about 2½ cups) uncooked medium egg noodles or rotini pasta
• 1/2 cup grated Parmesan cheese (optional)
• Fresh parsley, chopped, for garnish

Directions

1. I finely dice the onion, mince the garlic, and prepare the remaining ingredients before I begin. I trim any excess fat from the chicken breasts and pat them dry.
2. In a large skillet over medium heat, I melt the butter and cook the diced onion for about 3 to 4 minutes until softened. I stir in the garlic and cook for another 30 seconds.
3. I sprinkle the flour over the onion mixture and stir constantly for 1 to 2 minutes until the flour becomes lightly golden.
4. While whisking continuously, I slowly pour in the chicken broth until smooth. Then I add the milk and heavy cream, continuing to whisk until the sauce begins to thicken.
5. I stir in the thyme, rosemary, salt, and pepper, then remove the sauce from the heat.
6. I place the raw chicken breasts into the slow cooker and pour the creamy sauce over the top, making sure the chicken is mostly covered.
7. I cover and cook on HIGH for 2 to 3 hours or on LOW for 4 to 5 hours until the chicken is fully cooked and tender.
8. About 30 minutes before serving, I remove the chicken, shred it using two forks, and return it to the slow cooker.
9. I stir in the frozen vegetables and uncooked noodles, making sure the pasta is submerged in the sauce. If needed, I add a splash of chicken broth or milk to loosen the mixture.
10. I cook on HIGH for another 20 to 30 minutes, stirring halfway through, until the noodles are tender.
11. I stir in the Parmesan cheese if I’m using it, taste for seasoning, garnish with fresh parsley, and serve immediately.

Servings and Timing

• Servings: 6
• Prep Time: 15 minutes
• Cook Time: 25 minutes (including sauce preparation)
• Slow Cooker Time: 2 hours 20 minutes to 3 hours 30 minutes on HIGH, or 4 hours 20 minutes to 5 hours 30 minutes on LOW
• Total Time: Approximately 40 minutes of active preparation plus slow cooking

Variations

I like switching up this recipe depending on what I have available. Sometimes I use boneless chicken thighs instead of chicken breasts for an even juicier texture. I also enjoy adding mushrooms, spinach, broccoli, or diced celery for extra vegetables.

When I want a little more flavor, I stir in cooked bacon, a pinch of smoked paprika, or a dash of cayenne pepper. I can also swap the Parmesan for shredded cheddar, mozzarella, or Gruyère for a different cheesy finish. If I’m looking for a lighter version, I replace the heavy cream with half-and-half or additional milk while still keeping the sauce creamy.

Storage/Reheating

I store leftovers in an airtight container in the refrigerator for up to 3 days. If I want to keep it longer, I freeze portions for up to 2 months, although the noodles may soften slightly after thawing.

When I’m ready to enjoy leftovers, I reheat them gently on the stovetop or in the microwave with a splash of milk or chicken broth to bring back the creamy consistency. I stir occasionally while reheating to ensure everything warms evenly.

FAQs

Can I use rotisserie chicken instead of raw chicken?

Yes. I simply skip the slow cooking step for the chicken and stir shredded rotisserie chicken into the sauce before adding the vegetables and noodles.

Can I cook the pasta separately?

Absolutely. I sometimes cook the pasta separately and stir it in just before serving when I want firmer noodles or plan to store leftovers.

Can I make this recipe ahead of time?

Yes. I prepare the sauce and refrigerate it separately, then combine everything in the slow cooker when I’m ready to cook. I can also fully prepare the dish and reheat it before serving.

What vegetables work best in this recipe?

I enjoy using frozen mixed vegetables because they’re convenient, but broccoli, mushrooms, spinach, celery, or diced bell peppers also work wonderfully.

Can I freeze this casserole?

Yes. I freeze cooled portions in airtight containers for up to 2 months. I thaw them overnight in the refrigerator and reheat slowly with a little milk to restore the creamy texture.

Conclusion

I always come back to this Slow Cooker Creamy Chicken Noodle Casserole whenever I want a hearty meal that’s comforting and easy to prepare. The tender chicken, rich homemade sauce, colorful vegetables, and perfectly cooked noodles create a satisfying dinner that everyone enjoys. Whether I’m serving it for a busy weeknight meal or making it ahead for future lunches, this creamy casserole is a dependable family favorite that never disappoints.

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