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.
Judy says
The instructions say 11/4 cup onions in the dish and more on top. But the list of ingredients says 6 oz.
Julie Evink says
You place 1 1/4 c. in the dish then the rest you put on top of it as stated in step 3. Hope that helps Judy!
Tashi says
Merry Christmas!!
If I am doubling, do I need to double the time needed to bake it? Thanks in advance!
Julie says
You probably won’t need to double the time, I would say 30-45 minutes will do it!
Tashi says
Thanks for the reply! I made it a couple of days ago and baked it for about 45 minutes and it came out amazing!! Thank you so much for sharing this recipe. It is soo good~
Julie says
You’re welcome!! I’m so glad you enjoyed it!
Emma says
This is a staple for my holiday recipes. A good tip for others, it tastes even better the next day so I plan on making it this evening. Going to try just cauliflower and throwing bacon in there.
Julie says
I’m so glad you enjoy this one! Thanks for the tip, Emma!
Jeri Lynn Johnston says
Can you make this in a crock pot?
Julie says
I think it would work! It may take a while for the veggies to cook all the way through so you might want to do a full 6-8 hours on low.
Sue says
Just made this tonight. I add Sautéed chicken and mushrooms . Came out great!!!! Went to take a picture but it was all gone !!! Lol
Julie says
Awesome! So glad you enjoyed it!
Chelsea says
Oooo that’s like a whole meal! I’m making this as a side for my Christmas Eve dinner!
Julie says
I hope you all enjoy it!
Elaine Donohue says
Ive made this for years, but have always used swiss cheese. Its the most requested dish at any family gathering.
Julie says
Sounds lovely! Glad everyone enjoys it!
Carla says
Delish! My daughter and I went back for seconds! Only thing I add was a little pepper 🙂
Julie says
Excellent! Glad you and your daughter enjoyed it!
Chefyl says
So simple, so sublime. I used yogurt instead of sour cream, and don’t regret my decision. Went great with plan-fried chicken thighs. Thanks for the recipe!
Julie says
You’re welcome! So glad you enjoyed it!
KK Jo says
Are you aware of any low sodium French Fried Onions? I only see the one typical brand at the markets around me, and only one type.
Julie says
I’m sorry I’m not aware of any lower sodium options. You could maybe try an online search!
ANNE MARIE HIGGINS says
Hi Julie,
You are doing a wunnerful job…..(as my kids say), but I would like to use fresh veggies instead. Should I just add to cooking time ?
Stay well….I look forward to seeing things from you…
~ Anne Marie ~
Julie says
Thanks Anne Marie! You will probably want to boil them both first until they are crisp tender and then transfer them to the baking dish and finish out the recipe. You shouldn’t need extra time baking then. I hope you love it!
Carla Brinkoetter says
Julie – thank you for sharing your recipes and tips. I hope during these challenging times you and your family are safe and well.
Blessings
Carla
Julie says
Thanks Carla! We are doing well, a little stir-crazy, but healthy and safe!
frostique says
very easy recipe ty for providing it
Julie says
You’re welcome!
Staci Wendel says
Do you bake it and then refrigerate?
Julie says
No, I would refrigerate once it’s poured into the baking dish if you are making it ahead. Pull it out of the fridge and continue with the instructions. It may need a few more minutes to cook after being refrigerated.
Rose Ann Moon says
can I use a different soup beside Cream of Mushroom?
Julie Evink says
You can use any cream of soup. Like cream of chicken, cream of onion etc.
Kenette says
I’m making this ahead for Christmas! Thank you for a wonderful & easy recipe!