Hi, I am Lilly Mathuse and if you are anything like me you are always hunting for that perfect mix of comfort and nutrition in a family meal. This chicken broccoli pasta bake hits that sweet spot. It is cozy, honest, and it uses stuff you probably already have. I remember last Tuesday I was dead tired after a day of chasing Ellie and answering emails and I just dumped what was left in the fridge into a pan. It turned out amazing. Now it is a staple.
What makes this creamy chicken and broccoli casserole from scratch so special is how it turns the boring stuff at the back of the cupboard into a proper home cooked hug. It sneaks in broccoli without fuss and folds cheese through everything so even picky kids come back for seconds. The mushrooms add sneaky savory notes, like finding a lost toy under the couch. It makes me smile. Actually, scratch that. It makes everyone smile.
It feels lighter than old school casseroles because of the chicken and the bright broccoli, yet it still comforts. It is comfort food dinner for family at its best. Plus you can make it ahead and stash it in the fridge when life gets chaotic. One time I assembled it in the morning while Ellie was napping and baked it after soccer practice. Lifesaver. Muffin the dog sniffed the whole time so you know it passed the sniff test.
Preheat the oven to 375 °F.
Cook 8 ounces pasta in a large pot of salted boiling water until al dente.
Towards the end of pasta cooking time, add the broccoli florets to the boiling pasta and stir. Cook for 1 minute.
Drain the pasta and broccoli and set aside.
Meanwhile, in a large pan over medium-high heat, heat 2 tablespoons butter or olive oil and add 1 thinly sliced onion. Sauté, stirring occasionally, about 3 minutes.
Add 8 ounces thinly sliced white or cremini mushrooms and 2 minced garlic cloves. Sauté, stirring occasionally, until the mushrooms are cooked through, about 5 minutes.
Sprinkle 3 tablespoons flour evenly over the mushroom mixture and stir until evenly combined. Cook, stirring occasionally, for 1 minute.
Add in 1 cup chicken or vegetable stock and stir everything together until most of the clumps are dissolved.
Add in 1 ½ cups milk, 1 teaspoon Dijon mustard, ½ teaspoon fine sea salt, and ¼ teaspoon freshly-cracked black pepper and stir until combined. Cook the sauce until it reaches a simmer.
Remove the pan from the heat and stir in 1 cup shredded Cheddar cheese until combined. Taste and season with more salt and black pepper if needed.
In a 9 x 13-inch baking dish, combine the cooked pasta, broccoli, mushroom sauce and 2 cups diced chicken and toss until combined. Smooth the top into an even layer.
Bake uncovered for 15 minutes.
Remove the baking dish from the oven and sprinkle the remaining 1 cup Cheddar cheese evenly on top. Bake for another 10 minutes or until the cheese has melted.
Garnish with extra black pepper and fresh herbs if you wish. Serve warm.
Alright, let us get practical. You do not need a fancy setup. Grab a large pot for boiling pasta and broccoli, a good skillet or large pan for sautéing onions mushrooms and garlic, a wooden spoon for stirring, and a sharp knife for slicing. For baking, use a nine by thirteen inch casserole dish that can go from oven to table. A colander helps for draining and basic cups and spoons will do for measuring. If you have a whisk use it to help smooth the sauce, but a fork can pinch hit. Oven mitts please, because the oven is 375 degrees Fahrenheit. A cheese grater helps if your cheddar is not already shredded, but bagged cheese is fine when time is short.
Little tricks make the difference. When you add the flour to the saut茅ed onion and mushrooms, stir for a full minute so the raw flour taste cooks off. Then add stock slowly while you stir so the sauce stays smooth. Use fresh broccoli cut into bite sized pieces and add it to the pasta pot for the last minute so it stays bright and has a bit of snap. Overcook it and you lose that fresh bite. Leftover chicken is perfect here because shredded chicken absorbs the sauce and stays juicy.
Do not skimp on cheese. Stir one cup into the sauce so it is creamy, then save the rest for the top so you get that golden melted blanket. If your oven runs hot, tent the top briefly with foil so the cheese does not darken too fast. I like a tiny pinch of nutmeg in the sauce. It is subtle but it makes the whole dish feel warm and rounded. Let the bake rest a few minutes before you serve so slices hold together.
These tweaks make your one dish meal not just healthier but unforgettable. I once forgot to time the broccoli and we ended up with something resembling stew. True story. Learn from me.
I like to tinker. Try adding spinach or diced bell pepper with the mushrooms for a veggie boost. Saut茅 them first so they do not water the bake down. For adults only nights, stir in red pepper flakes or diced jalape帽o during the mushroom step for a spicy kick. Swap the chicken for cooked shrimp or canned tuna to make a lighter seafood version, but mind the salt if you use canned fish.
These ideas keep things interesting. Make small changes and stay true to the core so the dish still comforts like home.
Serve with a simple green salad dressed with a light vinaigrette to cut through the richness. Garlic bread or soft dinner rolls soak up the sauce and make kids very happy. Roasted carrots or steamed green beans are good if you want more veg on the plate. Sprinkle fresh parsley or chives on top for a fresh note and a bit of cracked black pepper for bite.
For adults a light white wine pairs well. For little ones, milk or a fruity juice does the trick. In winter I sometimes serve this alongside a bowl of soup for an extra comforting combo.
Large pot for pasta and broccoli, large skillet for saut茅ing, wooden spoon, sharp knife, colander, nine by thirteen inch casserole dish, measuring cups and spoons, whisk if you have one, oven mitts, and a cheese grater if you like to shred your own cheese. If you are missing something, improvise. Real life cooking is about making do.
Lumps happen but there are easy fixes. After you stir the flour into the vegetables for a minute, add the stock slowly while stirring. Then add milk and bring to a gentle simmer. If lumps sneak in, strain the sauce or use an immersion blender. Practice helps. I have had my share of lumps and now I know the rhythm of pouring and stirring that avoids them.
I think it might be the best leftover chicken casserole because the flavors get to know each other overnight and taste even better the next day. Store in an airtight container in the fridge for up to three days. Reheat in the oven at 350 degrees to crisp the top or zap portions in the microwave for speed. For longer storage freeze individual portions and thaw before baking.
Yes. Assemble everything up to the baking step, cover and refrigerate. Add a few extra minutes in the oven if it is cold from the fridge. Do not add the top cheese until you start baking to avoid sogginess. I have done this when Ellie had a birthday tea and it saved me from running around like a headless chicken.
If you have extra mushrooms slice and freeze them for future sauces or saut茅 them with garlic and keep them as a quick side. They are little flavor bombs that lift the whole dish.
This is a true comfort food dinner for family because it balances creamy sauce pasta vegetables and protein in one warm dish. It is filling but not heavy, and it is the kind of meal that makes everyone pause and eat slowly for once.
This is a real one dish meal covering carbs protein and veg so you do not need much else. A side salad is nice but optional. I love meals that save time on washing up.
This Healthier Broccoli Chicken Casserole is made from scratch and can be ready in an hour. It’s creamy, cheesy, and satisfying. Follow @cookmerecipes on Instagram, snap a photo, and tag it #cookmerecipes. We’d love to know what you are cooking!
Delicious chicken cassserole recipe!
