Name: Creamy Chicken Spaghetti
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Ingredients: 2 small boneless, skinless chicken breasts; 2 tsp Italian seasoning; Salt & pepper, to taste; 2 tbsp olive oil; 4 tbsp butter; 1 small yellow onion, diced; 3 cloves garlic, minced; 4 tbsp flour; 1 ½ cups chicken broth; ¾ cup milk; 4 oz cream cheese, softened; 1 cup shredded cheddar cheese; 10 oz diced tomatoes & green chilies (drained, or keep the juice for a thinner sauce); 8 oz thin spaghetti; 1 cup shredded mozzarella cheese; Red pepper flakes & chopped parsley, for garnish

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There’s something magical about a warm, cheesy casserole fresh out of the oven. It’s the kind of meal that makes your kitchen smell amazing and has everyone gathered around the table in anticipation. And when that dish happens to be Creamy Chicken Spaghetti—oh, you know it’s going to be a winner.

This dish is a beautiful combination of tender chicken, creamy sauce, gooey cheese, and just the right amount of spice. It’s the kind of meal that’s both indulgent and heartwarming—perfect for a cozy family dinner, meal prepping for the week, or even serving up at a potluck. If you love pasta, cheese, and comforting flavors, this one is for you!

WHY YOU’LL LOVE THIS RECIPE

Ultra Creamy & Cheesy – A rich homemade sauce packed with cream cheese, cheddar, and mozzarella makes every bite luxurious.
Just the Right Spice – A subtle kick from diced tomatoes & green chilies adds a flavor boost without overwhelming heat.
Perfect for Leftovers – This dish reheats beautifully, making it great for meal prep.
Easy to Customize – Swap out ingredients based on your preference or what you have on hand!

So, grab your apron, because we’re diving into this irresistibly creamy chicken spaghetti recipe.

INGREDIENTS YOU’LL NEED

Before we get into the step-by-step process, let’s take a look at what you’ll need:

For the Chicken:

2 small boneless, skinless chicken breasts
2 tsp Italian seasoning
Salt & pepper, to taste
2 tbsp olive oil

For the Sauce:

4 tbsp butter
1 small yellow onion, diced
3 cloves garlic, minced
4 tbsp flour
1 ½ cups chicken broth
¾ cup milk
4 oz cream cheese, softened
1 cup shredded cheddar cheese
10 oz diced tomatoes & green chilies (drained, or keep the juice for a thinner sauce)

For the Pasta:

8 oz thin spaghetti

For Topping:

1 cup shredded mozzarella cheese
Red pepper flakes & chopped parsley, for garnish

STEP 1: PREP YOUR INGREDIENTS

Before you start cooking, it helps to have everything chopped, shredded, and ready to go. Dice your onions, mince the garlic, and shred the cheddar and mozzarella cheese. If you’re using pre-cooked chicken, you can skip the next step.

STEP 2: COOK THE CHICKEN

If you’re starting with raw chicken breasts, follow these steps to get them juicy and flavorful:

Slice the chicken breasts in half lengthwise to create thinner pieces. This helps them cook evenly.
Season both sides with salt, pepper, and Italian seasoning.
Heat olive oil in a large skillet over medium-high heat.
Sear the chicken for 5-6 minutes per side until golden brown and fully cooked through.
Remove from the pan and let it rest for a few minutes before dicing into bite-sized pieces.

Pro Tip: If you’re in a hurry, feel free to use rotisserie chicken or any leftover shredded chicken you have on hand.

STEP 3: MAKE THE CREAMY SAUCE

Now comes the best part—creating that dreamy, cheesy sauce.

In the same skillet, reduce the heat to medium-low and melt the butter.
Add the diced onion and sauté for about 4 minutes, until softened.
Stir in the minced garlic and cook for another minute—you’ll know it’s ready when your kitchen starts smelling amazing!
Sprinkle in the flour and stir continuously for about 2 minutes until the raw flour taste is gone.
Slowly pour in the chicken broth, stirring constantly to avoid lumps.
Add the milk, whisking until smooth and slightly thickened.

At this point, your sauce should be velvety and rich, but we’re about to take it to the next level.

STEP 4: MELT THE CHEESE INTO THE SAUCE

Now, let’s make this sauce extra creamy:

Reduce the heat to low and add the softened cream cheese.
Stir continuously until the cream cheese melts into the sauce.
Gradually add the cheddar cheese, stirring until completely melted.
Stir in the diced tomatoes & green chilies (you can choose to add the juice or drain it, depending on how thick you want the sauce).
Finally, toss in the diced chicken and mix everything together.

Your sauce is now thick, cheesy, and packed with flavor!

STEP 5: COOK THE PASTA

While your sauce is coming together, bring a large pot of salted water to a boil. Cook your spaghetti according to the package directions until al dente (firm to the bite). Drain and set aside.

Now that you’ve got your creamy sauce, tender chicken, and perfectly cooked pasta, it’s time to bring everything together for the ultimate baked dish.

Add the drained spaghetti directly into the sauce. Use tongs or a large spoon to toss everything together until the pasta is fully coated in that rich, cheesy sauce.
If your skillet is oven-safe, you can bake the spaghetti right in the same pan. Otherwise, transfer everything to a greased 9×13 baking dish.
Sprinkle the mozzarella cheese evenly over the top.
Bake uncovered at 400°F (200°C) for 15 minutes. This will allow the cheese to melt beautifully.

Pro Tip: If you want that golden-brown, bubbly cheese topping, switch your oven to broil at 475°F for 1-2 minutes. Keep a close eye on it—cheese can go from perfectly golden to burned in a matter of seconds.

STEP 7: GARNISH AND SERVE

Once out of the oven, let the baked spaghetti sit for about 5 minutes before serving. This helps the sauce thicken up slightly, so every bite is creamy and delicious.

For the final touch, sprinkle with:
✔ Red pepper flakes for a little heat (optional but highly recommended)
✔ Fresh chopped parsley for a pop of color and freshness

Serve hot and pair with garlic bread or a side salad for a complete meal.

TIPS & VARIATIONS

1. Can I Use Different Pasta?
Absolutely! While spaghetti is traditional for this dish, you can swap it out for penne, rotini, or fettuccine if you prefer a different texture.

2. Can I Make This Ahead of Time?
Yes! Assemble everything in the baking dish, cover with foil, and refrigerate for up to 24 hours before baking. When ready to bake, allow the dish to sit at room temperature for 15 minutes, then bake as directed.

3. How Do I Make It Spicier?
For an extra kick, try adding:
✔ ½ teaspoon of cayenne pepper to the sauce
✔ Extra diced green chilies
✔ A drizzle of hot sauce before serving

4. Can I Add Veggies?
Of course! Some great additions include:
✔ Sautéed mushrooms
✔ Spinach or kale
✔ Diced bell peppers

5. What If I Don’t Have Cream Cheese?
No problem! Substitute with sour cream or Greek yogurt for a slightly tangier but still creamy sauce.

FREQUENTLY ASKED QUESTIONS

Creamy Chicken Spaghetti