Name: Broccoli Cheddar Spaghetti Casserole Recipe
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 1 pound dry spaghetti; 3 cups broccoli florets; 4 ounces cream cheese, at room temperature; 2 cups whole milk cottage cheese; 1 1/2 cups milk; 4 eggs, beaten; 1/4 cup chopped fresh parsley; 1/2 cup grated Parmesan cheese; 2 tablespoons salted butter; 1 pound boneless chicken breasts, cut into cubes; 1 yellow onion, chopped; 2 tablespoons fresh thyme leaves; 1 teaspoon paprika; 1 teaspoon garlic powder; 1/2 teaspoon cayenne pepper; Salt and black pepper to taste; 2 1/2 cups shredded cheddar jack cheese (or use 1 1/2 cups cheddar and 1 cup Monterey Jack)

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If you are on the hunt for a comforting, cheesy, and vibrant dish that brings together the best of veggies and pasta, this Broccoli Cheddar Spaghetti Casserole Recipe is going to steal your heart. It’s an irresistible combination of tender spaghetti, fresh broccoli, succulent chicken, and layers of creamy cheeses baked to golden perfection. Every bite delivers a luscious blend of flavors and textures, making it a perfect family meal for a cozy night in or to impress guests with minimal fuss. Trust me, once you try this recipe, it will become one of your go-to favorites for easy weeknight dinners or weekend treat-yourself moments.

Ingredients You'll Need

A large yellow pot filled with long spaghetti noodles cooking in clear broth with bright green broccoli florets scattered on top, steaming hot with wisps of steam rising from the pot. A wooden spoon is stirring the noodles and broccoli from the right side. The pot sits on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Getting ready to make this Broccoli Cheddar Spaghetti Casserole Recipe is a breeze because the ingredients are straightforward yet pack a punch in flavor and texture. Each item plays a key role—from the creamy cheeses that make every forkful dreamy, to the vibrant broccoli and perfectly spiced chicken that elevate the entire dish.

Dry spaghetti (1 pound): The pasta base that soaks up all the delicious cheesy sauce perfectly.
Broccoli florets (3 cups): Adds bright color and a wonderful fresh crunch to balance the richness.
Cream cheese (4 ounces, room temperature): Creates a smooth, velvety texture in the sauce.
Whole milk cottage cheese (2 cups): Brings a subtle tang and extra creaminess to the mix.
Milk (1 ½ cups): Keeps the casserole moist and helps blend the flavors.
Eggs (4, beaten): Bind everything together beautifully when baked.
Fresh parsley (¼ cup, chopped): Adds a lively herbal note and a pop of green.
Grated Parmesan cheese (½ cup): Infuses salty, nutty undertones that deepen the flavor.
Salted butter (2 tablespoons): Used to sauté chicken and veggies, adding richness and flavor.
Boneless chicken breasts (1 pound, cubed): Provides hearty protein and soaks up those amazing spices.
Yellow onion (1, chopped): Adds sweetness and aroma during cooking.
Fresh thyme leaves (2 tablespoons): Earthy herb that brightens the savory notes.
Paprika (1 teaspoon): Gives a gentle smokiness and beautiful color.
Garlic powder (1 teaspoon): Enhances flavor with that unmistakable garlicky warmth.
Cayenne pepper (½ teaspoon): Adds a subtle kick that wakes up your taste buds without overpowering.
Salt and black pepper: Season perfectly to your liking.
Shredded cheddar jack cheese (2 ½ cups): Or a mix of sharp cheddar and Monterey Jack for melty, gooey goodness.

How to Make Broccoli Cheddar Spaghetti Casserole Recipe

Step 1: Prep and Cook the Pasta with Broccoli

Start by preheating your oven to 400°F and greasing a large casserole dish with butter if you don’t have an oven-safe skillet. Bring a large pot of salted water to a boil and cook the spaghetti according to package instructions until al dente. About 2 minutes before the pasta is done, toss in the broccoli florets so they steam alongside the pasta. Drain everything together and return it to the pot for the next step.

Step 2: Make the Creamy Cheese Sauce

While the pasta is hot, stir in the cream cheese until it melts smoothly. Then add the cottage cheese, milk, beaten eggs, chopped parsley, and grated Parmesan. Mix everything until you have a creamy, luscious sauce coating the spaghetti and broccoli—it’s the heart of this casserole’s satisfying texture and flavor.

Step 3: Cook the Chicken and Aromatics

In a large oven-safe skillet, melt the butter over medium heat and add the cubed chicken, yellow onion, thyme leaves, paprika, garlic powder, cayenne, salt, and black pepper. Sauté everything for 5 to 8 minutes or until the chicken is cooked through and lightly golden, and the butter is toasted with all those lovely spices.

Step 4: Assemble and Bake the Casserole

Gently fold the cheesy pasta and broccoli mixture into the chicken skillet, combining everything without breaking down the delicate pasta. Top it all generously with the shredded cheddar jack cheese. Slide the skillet (or casserole dish) into the oven and bake for about 20 minutes until the cheese is melted, bubbly, and just starting to brown at the edges. Your kitchen will smell incredible!

How to Serve Broccoli Cheddar Spaghetti Casserole Recipe

A white cast iron pan filled with baked spaghetti casserole that has a golden brown, melted cheese top layer with scattered small green herb leaves on it. The casserole's middle layer shows creamy spaghetti noodles mixed with chunks of white meat, lightly coated in sauce. Around the pan, you can see a wooden board underneath and a soft textured gray towel on one side. The background surface is white with a marbled texture. In the top corners, there are two white plates with blue floral designs holding small servings of the same spaghetti dish and a black fork resting on one plate. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

A sprinkle of fresh thyme or basil leaves right before serving adds a fresh, aromatic lift that complements the richness of the casserole beautifully. If you want a bit of sparkle, a handful of chopped fresh parsley provides a bright, herbaceous finish.

Side Dishes

Since this casserole is a hearty main, light, crisp sides work best. A simple mixed green salad with a lemon vinaigrette, or roasted cherry tomatoes drizzled with olive oil and balsamic vinegar, add freshness and balance. Steamed green beans or a quick sauté of zucchini ribbons also pair nicely without overwhelming your plate.

Creative Ways to Present

For a family gathering or potluck, serve the Broccoli Cheddar Spaghetti Casserole Recipe right in the skillet for that rustic, cozy vibe. Want to dress it up? Spoon individual portions into cute ramekins, then broil briefly to get a crunchy cheese topping that will dazzle your guests.

Make Ahead and Storage

Storing Leftovers

Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. It keeps well thanks to the creamy cheese sauce and hearty chicken, making it perfect for quick lunches or dinners after a busy day.

Freezing

This casserole freezes beautifully. Portion it into freezer-safe containers or wrap the whole casserole tightly with foil and plastic wrap before freezing. It will keep in the freezer for up to 2 months without losing flavor or texture.

Reheating

Reheat leftovers gently in the oven at 350°F until warmed through to keep that baked texture intact. If you’re in a hurry, the microwave works too—cover the dish to retain moisture and heat in short bursts, stirring if possible, to ensure even warming.

FAQs

Can I use a different type of pasta?

Absolutely! While spaghetti is classic here, feel free to swap in penne, rotini, or any pasta you love. Just adjust the cooking time accordingly to keep it al dente before baking.

Is it possible to make this recipe vegetarian?

Yes, just omit the chicken and maybe add extra broccoli or another veggie like mushrooms or bell peppers. You’ll still get lots of flavor and texture from the cheese and herbs.

What can I substitute for cottage cheese?

If you don’t have cottage cheese, ricotta or even plain Greek yogurt works well to keep the creamy consistency and add richness.

Can I prepare this casserole ahead of time before baking?

Definitely! Assemble the casserole, cover it tightly, and refrigerate for up to 24 hours before baking. Just add a few extra minutes to the baking time if baking straight from the fridge.

How do I know when the casserole is done?

Look for bubbly melted cheese on top that’s starting to turn golden brown. The internal temperature should be piping hot, and the chicken fully cooked, with the pasta tender but not mushy.

Final Thoughts

I can’t recommend this Broccoli Cheddar Spaghetti Casserole Recipe enough if you’re craving a dish that feels like a warm hug of cheesy, tender pasta and fresh veggies. It’s straightforward to make, wildly satisfying, and versatile enough to fit any occasion. Give it a try and watch it quickly become a beloved staple in your recipe rotation—you won’t be sorry!

Broccoli Cheddar Spaghetti Casserole Recipe

Ingredients You'll Need

How to Make Broccoli Cheddar Spaghetti Casserole Recipe