
This creamy chicken broccoli alfredo casserole turns simple staples into a fancy dinner that's now my favorite for when I've got friends over who love good, hearty food. When you mix juicy chicken, perfectly cooked pasta and crisp broccoli all covered in creamy homemade sauce, you'll end up with a meal that vanishes from plates in no time.
I came up with this dish totally by chance when my sister dropped by with her kids during a surprise snowstorm. With hardly any time and just what I had in my cupboards, I threw this together. Now they ask for it every time we get together.
Ingredients
- Boneless skinless chicken breasts: gives you plenty of protein and soaks up all the yummy flavors around it
- Fresh broccoli florets: brings nice crunch, pretty green color and loads of good stuff for your body grab ones with bright color and tight bunches
- Farfalle or penne pasta: their little nooks hang onto the sauce really well
- Heavy cream: makes the sauce super rich and smooth don't go for low-fat here
- Freshly grated Parmesan cheese: the key to a real alfredo taste those pre-shredded bags won't melt right
- Minced garlic: puts amazing flavor all through the dish fresh works way better than stuff from jars
- Italian seasoning: gives you lots of herb flavors in one easy scoop
- Olive oil: needed for cooking and keeping food from sticking try to use something decent
Step-by-Step Instructions
- Prepare the baking dish:
- Coat a 9×13 inch dish really well with olive oil, getting the sides too so nothing sticks. This makes serving so much easier later on.
- Cook the chicken:
- Chop chicken breasts into 1inch chunks and sprinkle them with salt and pepper. Warm olive oil in a big pan over medium heat until it shimmers, then add your chicken pieces without cramming them together. Cook about 6-8 minutes, turning now and then, until they're golden all over and hit 165°F inside.
- Add vegetables:
- Put the chopped garlic and broccoli into the pan with your chicken. Cook for 3-4 minutes, stirring often so the garlic doesn't burn. Your broccoli should look extra green but still have some bite since it'll cook more in the oven.
- Prepare the pasta:
- Get a big pot of water boiling hard, throw in a spoon of salt, then cook your pasta for a couple minutes less than what the box says. Save half a cup of the cooking water before draining. The pasta will get softer in the oven, so you want it a bit firm now.
- Create the alfredo sauce:
- In another pot, slowly warm the heavy cream on medium-low until tiny bubbles form but it's not fully boiling. Slowly mix in your freshly grated cheese until it's all melted and smooth. Stir in the Italian seasoning and add salt and pepper how you like it. If it looks too thick, splash in some of that pasta water you saved.
- Combine components:
- In your oiled baking dish, carefully mix the pasta, chicken-broccoli mix, and your creamy sauce until everything gets coated nicely. If it seems dry, add a bit more of that pasta water.
- Bake to perfection:
- Put your dish in the middle of your hot oven and bake it uncovered for 20-25 minutes. The top should get a little golden and the edges should bubble. Let it sit for 5 minutes before you dig in so the sauce can thicken up.

What really makes this dish special is using freshly grated Parmesan. My grandma from Italy always told me never to use the stuff from a shaker for alfredo sauce. You won't believe how much better it melts and tastes, turning this from just a nice meal into something everyone remembers.
Make-Ahead Options
This alfredo dish is perfect for planning ahead. You can put the whole thing together up to a day before you need it, wrap it tight with plastic, and stick it in the fridge. When you're ready to cook, take it out about half an hour before baking and add 5-10 extra minutes in the oven. It actually tastes even better after sitting overnight, which is great for busy evenings or when company's coming.

Clever Substitutions
You can easily switch things up in this dish depending on what you've got. Use leftover turkey or store-bought rotisserie chicken to save some time. If you're out of broccoli, try throwing in some asparagus, peas, or spinach. Want it a bit lighter? Use half and half instead of heavy cream and add a spoon of flour to keep it thick. The gluten-free pastas work really well too if anyone can't have wheat, and nobody will notice the difference.
Serving Suggestions
Make this comfort food even better with some smart sides. A basic green salad with lemony dressing cuts through the richness really well. Some garlic bread or crusty Italian loaf works great for soaking up the extra sauce. When you want to wow dinner guests, add some roasted cherry tomatoes still on the vine and pour glasses of Pinot Grigio or Chardonnay that go perfectly with the creamy flavors.
Common Questions
- → What type of chicken works best?
Go for boneless, skinless chicken breasts, though thighs can give you a deeper taste if you prefer.
- → Can I use frozen broccoli?
Sure, frozen broccoli does the trick. Just make sure to thaw it and dab away moisture first.
- → Is there a substitute for Parmesan cheese?
Try Pecorino Romano or Asiago if you're out of Parmesan. They'll give you that same bold, savory kick.
- → Can I make this ahead of time?
You bet. Put everything together, stick it in the fridge uncooked. When you're ready, pop it in the oven and cook it a bit longer than usual.
- → How can I add more vegetables?
Toss in some mushrooms, colorful bell peppers, or even spinach if you want extra veggies and nutrients.