Chicken and Broccoli Alfredo Bake (Dump and Bake, No Boil Pasta)

If you’ve ever stood in your kitchen at 5:07 PM wondering how dinner became your responsibility again, this chicken and broccoli alfredo bake is exactly the recipe you need in your life.

Because truly — some nights we want homemade comfort food… but we don’t have homemade energy.

That’s where this comes in.

Instead of boiling pasta, making a stovetop sauce, and washing three different pans, this dump and bake chicken alfredo lets the oven do the work. You stir everything right in one dish, cover it, and the pasta actually cooks in the homemade Alfredo sauce while it bakes. Meanwhile, the broccoli steams perfectly and the chicken warms through. In other words, dinner cooks itself while you help with homework, unload backpacks, or just sit down for five minutes.

And honestly, those are the recipes I build my weekly meal plan around.

Why This Chicken and Broccoli Alfredo Bake Works

At first glance, it almost feels wrong to put uncooked pasta into the oven. However, this method works because the pasta absorbs liquid slowly while baking. As a result, the noodles release starch directly into the sauce, which naturally thickens the Alfredo without needing a flour-based roux.

Even better, the heavy cream, parmesan, and butter emulsify with that starch while the casserole rests after baking. Therefore, what goes into the oven looking like a thin, soupy mixture comes out as a thick, creamy Alfredo that coats every bite.

So although it looks unusual before baking, trust the process — this is exactly how a no boil pasta bake is supposed to work.

Ingredients

Below is everything you’ll need to make this chicken and broccoli alfredo bake. One of the best parts about this recipe is that it uses simple, everyday ingredients — nothing complicated and no jarred sauce required.

Pasta & Protein

• 2 cups uncooked penne or rotini pasta
• 2 cups cooked chicken, diced (rotisserie chicken works perfectly)
• 2 cups frozen broccoli florets (do not thaw)

Homemade Alfredo Sauce

• 3 cups chicken broth
• 1 ½ cups heavy cream
• 4 tablespoons butter, melted
• 1 teaspoon garlic powder
• 1 teaspoon salt
• ½ teaspoon black pepper
• 1 teaspoon Italian seasoning
• ½ teaspoon onion powder
• 1 ½ cups freshly grated parmesan cheese

Topping

1 cup shredded mozzarella cheese

How to Make Chicken and Broccoli Alfredo Bake


Step 1: Preheat the Oven

First, Preheat your oven to
400°F.

Then lightly grease a 9×13 baking dish to prevent sticking and make cleanup easier later.

Step 2: Make the Alfredo Base in the Baking Dish

Next, you will build the sauce directly in the casserole dish — no bowl needed.

Pour into the dish:

• chicken broth
• heavy cream
• melted butter

After that, add:

• garlic powder
• salt
• pepper
• Italian seasoning
• onion powder
• parmesan cheese

Whisk everything together right in the dish until the butter is fully incorporated and the parmesan is dispersed. The mixture will look thin, but that is exactly what you want at this stage.

Step 3: Add the Pasta

Now add the uncooked pasta to the sauce.

Stir well so every noodle is coated in liquid. This step is important because the pasta cooks by absorbing the Alfredo while it bakes.

Step 4: Add the Chicken and Broccoli

Stir in the diced chicken and the frozen broccoli florets.

Then gently press everything down so the pasta is mostly submerged under the liquid. Any noodles sticking above the surface may cook unevenly.

Step 5: Cover and Bake

Cover the dish tightly with aluminum foil.

Bake for 45 minutes.

During this time, the pasta softens and releases starch, which naturally thickens the sauce while the broccoli steams and the chicken heats through.

Step 6: Stir and Add Cheese

Carefully remove the foil and stir the casserole well. At this point the sauce may look loose or slightly soupy — this is completely normal.

Sprinkle the mozzarella cheese evenly over the top.

Return the dish to the oven uncovered and bake for another 10–15 minutes, or until the cheese is melted and bubbly.

Step 7: Let It Rest (Very Important)

Finally, remove the casserole from the oven and let it sit for 10–15 minutes before serving.

Although it may look saucy at first, the pasta will continue absorbing liquid as it rests. Consequently, the Alfredo thickens into a creamy sauce that coats every bite instead of pooling in the pan.

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You now have a creamy, comforting chicken broccoli pasta casserole made entirely in one pan — no boiling pasta, no stovetop sauce, and minimal cleanup.

Frequently Asked Questions

Do you have to cook the pasta first?

No. That’s actually the whole point of a dump and bake chicken alfredo. The uncooked pasta softens and cooks directly in the sauce while the dish bakes. Because the noodles absorb the broth and cream, they end up more flavorful than traditionally boiled pasta.

Can I use fresh broccoli?

You can, but frozen broccoli works better. Fresh broccoli tends to overcook and turn mushy during the long bake time. On the other hand, frozen florets steam gently in the casserole and keep their color and texture. As a result, the final dish feels balanced instead of heavy.

Why is my Alfredo sauce thin when it comes out?

This is completely normal. In fact, it’s expected. When the casserole first leaves the oven, the sauce hasn’t finished thickening yet. However, after resting for about 10–15 minutes, the pasta absorbs more liquid and the parmesan binds with the cream. Consequently, the sauce becomes thick and creamy without any extra steps.

Can I use milk instead of heavy cream?

I don’t recommend it. Milk has a higher water content and may separate during baking. Heavy cream, by contrast, emulsifies with the cheese and butter and creates that classic Alfredo texture.

Tips for the Best Chicken and Broccoli Alfredo Bake.

1. 
   First, make sure the pasta is mostly submerged before baking. Any noodles sticking out of the liquid may dry out instead of softening.

2.
Next, cover the dish tightly with foil. This step is very important because the casserole cooks using steam. Without a tight seal, the liquid evaporates too quickly and the pasta won’t fully hydrate.

3.
Additionally, always stir the casserole once after the initial bake. This releases starch from the pasta and helps thicken the sauce evenly.

4.

Finally, and most importantly, let the casserole rest before serving. Although it’s tempting to scoop immediately, allowing it to sit for 10 minutes transforms the texture completely. The Alfredo will cling to the pasta instead of pooling in the pan.

What to Serve With Chicken and Broccoli Alfredo Bake

Because the casserole is rich, lighter sides pair best. For example:

• a simple green salad
• roasted green beans
• garlic bread
• or fresh fruit

That way, dinner feels complete without extra effort.