Broccoli Cauliflower Casserole
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Looking for an easy side dish? This cheesy Broccoli Cauliflower Casserole is the perfect side dish for the weeknight! Even your kids will love this casserole topped with cheese. Plus, it’s perfect for a holiday side dish too!
Warm and cheesy broccoli cauliflower casserole is a MEGA comfort food side dish. This flavorful and simple casserole pairs well with pretty much anything. Honestly, it’s so yummy that I would eat it all on its own. Just give me a spoon or a fork, I’m ready to eat the whole pan by myself!
What is it about casseroles that just make them so comforting? I mean, my cheeseburger casserole is one of our go-to cozy meals, cheesy ham and noodles casserole makes me drool just thinking about it, and broccoli cauliflower casserole is absolute perfection. If there’s a food out there that isn’t in casserole form, just give me time and I’ll make one!
Why You’ll Love this Broccoli Cauliflower Casserole
- It only takes 45 minutes to make this recipe from start to finish! But the prep time is only 15 minutes, making it super easy to throw together and pop in the oven.
- This is a wonderful dish for potlucks and parties. Impress the crowd with a deliciously cheesy creation!
Ingredients for Broccoli Cauliflower Casserole Recipe
- Frozen vegetables – Use both frozen broccoli florets and frozen cauliflower florets in this recipe. You can use fresh broccoli and fresh cauliflower if you prefer, but frozen is really easy to use in this recipe.
- Cream of mushroom soup – If you don’t like cream of mushroom soup, you can use cream of chicken instead.
- Sour cream – Make your casserole extra creamy and have a little sour bite with some sour cream. Even if you don’t like sour cream, give it a try in this recipe! It really does make all the difference.
- Sharp cheddar cheese – Mild cheddar cheese also works, but the bite of sharp cheddar is super tasty! You could also opt for a more “fancy” cheese like gruyere or gouda.
- French fried onions – French fried onions are a staple in green bean casserole, and they are for this delicious casserole too!
Helpful Tools
How to Make Broccolli Cauliflower Casserole
- Prep – Preheat the oven to 325 degrees F and then grease a baking dish and set it aside.
- Mix – In a large saucepan or large pot combine the canned soup, sour cream, shredded cheese and fried onions. Stir over medium heat until thoroughly combined and smooth, making a creamy cheese sauce. Then add the broccoli and cauliflower and continue stirring until combined. If needed, add some salt and black pepper.
- Bake – Pour the mixture to the previously prepared baking dish. Place in preheated oven and bake 25-30 minutes, uncovered to ensure the veggies are cooked to a tender texture. Top with remaining cheese and onions and place back in oven until cheese melts.
How to Store Broccoli Cauliflower Casserole
FRIDGE: Transfer leftovers to an airtight container and store in the refrigerator for up to3 days. You can also cover your broccoli and cauliflower casserole tightly in plastic wrap and store that way.
FREEZER: Leftover casserole can be frozen in an airtight container for up to 3 months. Keep in mind that the texture may change once it is thawed and reheated.
What to Serve with Broccoli and Cauliflower Casserole
This casserole is one of my favorite sides to serve with hearty protein dishes like garlic butter steak bites, baked chicken thighs and parmesan crusted tilapia. Air fryer whole chicken and crock pot turkey breast would pair well with this too.
Pork schnitzel and slow cooker chicken thighs are great main dishes to serve with this broccoli cauliflower casserole recipe too.
Can you make broccoli cauliflower casserole ahead of time?
Absolutely! Make it all the way up to the baking stage, but skip sprinkling the extra cheese and topping of fried onions. Then wrap the casserole tightly in plastic wrap and store in the fridge for 24-48 hours. When you are ready to bake your cauliflower broccoli casserole, add the toppings and bake!
If you want a different topping, a parmesan cheese breadcrumb topping would be super tasty. Just mix up some parmesan cheese, bread crumbs and melted butter and sprinkle it over the casserole. You can also add seasonings like garlic powder and onion powder.
Panko breadcrumbs, crushed ritz crackers, and gluten-free breadcrumbs will all work.
Is it better to use fresh or frozen broccoli in a casserole?
A large head of cauliflower or broccoli can be chopped up and used in this simple recipe, but you’ll need to steam or roast them first. I find it much easier to use frozen veggies. Ultimately, both fresh and frozen work great so you can use whichever you prefer! If you use fresh, just keep in mind that you may need to adjust the bake time.
Pro Tips for the Best Broccoli and Cauliflower Casserole
- When it comes to baking a casserole, glass, ceramic, or pyrex is your best choice. They take longer to heat up, but conduct heat well and get super hot. An oven-safe dish is a must. Another must? Dishwasher safe for easy clean-up!
- Grab a block of cheese and grate it yourself because it will melt better! Pre-Shredded cheese has additives that hinder it from melting perfectly.
- While I recommend sharp cheddar, you can certainly substitute with Monterey Jack or Provolone Cheese. If you do use a milder cheese a handful of Parmesan will add the sharp saltiness of the cheddar.
See that cheesy goodness? I don’t know what you’ll love more: the cheesiness of this casserole or the crunchy onions when all of this bakes up to golden, bubbly deliciousness! Mmmm!!!!
More Casserole Recipes You’ll Love
- Got leftover ham? Make this easy Ham and Green Bean Casserole for dinner!
- Hosting the holidays? You can’t forget this easy Sweet Potato Casserole.
- Always a favorite at holidays is this easy Shredded Potato Casserole using frozen hash browns.
- A delicious twist on corn as a dish is Corn Pudding Casserole.
Did you make this? If you snap a photo, please be sure tag me on Instagram at @julieseatsandtreats or #julieseatsandtreats so I can see your yummy treat!
Cheesy Broccoli Cauliflower Casserole
Ingredients
- 10.75 oz condensed cream of mushroom soup 10.75 oz
- 1 c. sour cream
- 1 1/2 c sharp cheddar cheese shredded, divided
- 6 oz french fried onions
- 16 oz frozen broccoli florets thawed
- 16 oz frozen cauliflower florets thawed
Instructions
- Preheat oven to 325 degrees F. Grease 2 quart baking dish and set aside.
- In a saucepan combine soup, sour cream, 1 c. cheese and 1 1/4 c. fried onions. Stir over medium heat until blended. Add broccoli and cauliflower (thawed), stir until combined.
- Transfer to prepared baking dish. Place in preheated oven and baked 25-30 minutes, uncovered. Top with remaining cheese and onions and place back in oven until cheese melts.
Tea says
Can I make it without the fried onions? Trying to think of a way to make it with much lower carbs? Any suggestions?
Julie says
Yes! You can definitely leave those off.
Susan says
Thanks a million, will give it a go next month and see how it goes over.
Susan
Julie says
Awesome! Let me know how it goes!
Susan Charles says
Stupid question, but do you think this would be good with Thanksgiving Turkey? It sure looks good. The people that will be here are all very “traditional “ type eaters.
Thank you,
Susan
Julie says
I think it would be great at Thanksgiving! You could try it as an extra side to the traditional sides and see how it goes!
Tina says
I’m making it this year for the first time instead of green bean casserole! Only adjustment is I’m using only cauliflower
Julie says
Sounds great! Hope you enjoy!
pamela says
Just wondering time frame in a crockpot?
Julie says
I haven’t tried this but I would say on Low probably 4-6 hours and on High around 2-3 hours but make sure to keep an eye on it so the edges don’t get too hot and crispy as it’s cooking.
jackie l cooper says
I’m all avout easy and delicious. This recipe is BOTH!
Julie Evink says
Can’t go wrong with that combo 🙂
hildy says
Am i just using the content of the can of soup or adding water at all?
Julie Evink says
Just the soup.
Melani says
Looking forward to trying this….but I followed the instructions and after 30 minutes it’s still cold in the middle. Are the frozen veggies supposed to be thawed or cooked first? The recipe just says to stir them in until blended and then transfer to the baking dish, which is what I did.
Julie Evink says
Yes according to the directions (in the ingredients it says thawed) they were supposed to be thawed.
Charlotte says
This casserole is so delicious that it is hard to stop eating it before the dish is empty!
Julie Evink says
Great problem to have 🙂
Heather says
Can you just add everything to the slow cooker?
Julie Evink says
Please read and follow the instructions in the recipe card.
Tiffany says
How do you make this in advance? Thanks!
Susan says
I used fresh veggies and prepared the dish right up to where it should go in the oven. I wrapped it VERY securely and froze it. Took it out of the freezer the night before cooking and left it on the counter until it was room temperature and then cooked it. Nothing left but the finish on the dish I served it in. Fabulous side dish.
Julie says
Awesome! I’m so happy you enjoyed it, and thanks for the tips on freezing it!
Julie says
I haven’t tried it as a make-ahead but it looks like Susan gave it a shot and it worked well for her!
Malinda says
We love broccoli and cheese casseroles!! It makes a perfect side dish for just about anything!!
Julie Evink says
Such a great staple recipe!
Debra C. says
The fried onions on top totally made this meal, we loved it!!
Julie Evink says
I had to steal a few of those from the jar to sample 😉
Melissa Howell says
This sounds like the perfect side dish for everything! I totally want to make this!
Danielle Green says
What a great side for dinner, picnics, or BBQs!
Julie Evink says
One of our favorites! Such a flexible side dish!
Sarah says
A great way for my kids to eat broccoli and cauliflower.
Julie Evink says
Always up for tricking them into eating it!
Jenn says
Ohmygosh YUM!!! Can I eat this forever? Total comfort food on a plate – we love it!
Julie Evink says
Yes, yes you can!