This easy and cheesy Broccoli and Cauliflower Casserole Recipe and so simple to make and is the perfect dish for any meal! Made without condensed soup, loaded with vegetables, and made in under 30 minutes, this creamy and cheesy casserole will become a household favourite.

If you’d like more casseroles to try, you’ll love my Cauliflower Casserole Recipe, Sweet Potato Zucchini Casserole, and Zucchini Casserole Recipe.

baked dish with broccoli and cauliflower with melted cheese on top

If you’ve ever had difficulties getting your little ones to eat their veggies at dinner time, I totally understand. It can be tough trying to convince kids to try something that they don’t want to! However, I’ve got a solution for you with this delicious broccoli and cauliflower casserole recipe.

This cheesy broccoli cauliflower casserole has it all: chicken, vegetables and all the cheesy goodness that no one can say no to! The cream cheese, half-and-half cream, and the cheese give this casserole a perfectly creamy texture.

How to Make this Cauliflower Casserole Recipe

Ingredients

Head Cauliflower — large head, cut into small florets.
Head Broccoli — large head, cut into small florets. If you have extra, try this Easy Broccoli Salad Recipe!
Chicken breast — cooked. Alternatively, you can use any boneless, skinless part of the chicken. This is a great recipe to use up any leftover chicken you may have in the fridge!
Cream cheese — softened to room temperature. You can also substitute with reduced-fat cream cheese if you prefer.
Half-half cream
Mozzarella — shredded (sprinkle evenly over the casserole or baking dish). You can also replace mozzarella cheese with Gouda, sharp cheddar cheese, or gruyere, if you prefer.
Seasoning — garlic powder (or cloves of garlic), onion powder, salt, and pepper

P.S.: This cauliflower broccoli casserole doesn’t require chicken broth, melted butter, or unsalted butter.

step by step photos of how to steam the vegetables, the casserole mixture, and mixed ingredients

Instructions

Prep the Oven and Vegetables

Adjust the oven rack to the middle position, and preheat the oven to 425°F.
Steam the head of cauliflower and broccoli by filling a large pot with about 2 cups of water and placing a steamer basket in the bottom.
Bring the water to a boil. Add the cauliflower and broccoli florets into the steamer basket. Cover the pot and steam for about 5 minutes.

Prep the Chicken and Cheese Mixture

In a large bowl, pour half-and-half cream and add cooked chicken, cream cheese, mozzarella, garlic powder, onion powder, salt, and freshly ground black pepper. Mix until combined to make this cheese sauce.
Remove the cauliflower and broccoli from the heat and place them in the cream cheese mixture bowl.

Bringing Everything Together and Baking

Use the cooking spray to grease the baking dish. Spoon the cauliflower and broccoli mixture into an oiled casserole dish and top with remaining mozzarella cheese. Bake uncovered for 10 minutes or until the cheese is melted.

step by step photos of placing the broccoli cauliflower chicken cheese mixture into the pan, topping with more cheese, and then baking until golden.

Tips To Making This Broccoli Cauliflower Casserole

If you prefer the cheese to be a little bit more golden on the top, you can turn the broiler on high for the final 3 minutes and broil it. Keep a close eye on it, as it can quickly go from golden brown to burnt!
Shred your own cheese! I know it can be a little bit of extra work but store-bought shredded cheese comes coated with a powder to prevent them from clumping, this can make the cheese grainy when melted. So shredding your own cheese gives you a smoother finish.
Don’t have fresh cauliflower or broccoli? Frozen florets work as well! Just be sure to steam them fully to avoid extra water.
Got leftover chicken? Add it to this casserole. We use diced chicken breast for this casserole but feel free to make it your own, just make sure to make sure there are no bones or skin.
Other vegetables such as leek, shallots, and green onions make for a wonderful addition to the casserole.
If you want a crispier bite, try adding some panko breadcrumbs over the top of the casserole. It’ll crispy up wonderfully.
Feel free to swap the mozzarella cheese for another cheese such as cheddar cheese, parmesan cheese, Monterey Jack, Colby-Jack Cheese, or Fiesta Blend Cheese are great swaps as well. Alternatively, you can use a mix of two or more cheeses. Try to use a good melting cheese so the cheese melts smoothly.
Cut your broccoli and cauliflower florets into roughly equal-sized pieces so they cook evenly in the oven.
A handful of crumbled crispy bacon mixed into the casserole before baking makes for a tasty and crispy addition.

close up of a broccoli and cauliflower casserole

Can I make this ahead of time?

You can prep this broccoli and cauliflower casserole ahead of time, in two different ways. You can steam your broccoli and cauliflower and cook your chicken ahead of time and store it in an airtight container in your fridge for up to 3-4 days before putting the casserole together.

Alternatively, you can cook this casserole ahead of time, and once it has cooled, wrap it up tightly and store it in the fridge for up to 3 days. Reheat it in the oven at a lower temperature, such as 350°F, covered with tinfoil, until the whole casserole has heated through. The tinfoil is to prevent the top of the casserole from drying out.

Overhead photo of a baking dish containing broccoli and cauliflower casserole.

More Cauliflower Recipes to Try

Roasted Cauliflower: All you need are a handful of simple ingredients, and you’ll have this spicy roasted cauliflower recipe ready in no time. It’s the perfect side dish for any meal.
Cauliflower Potato Salad Recipe: Made all the traditional flavors of a potato salad, this version is made with cauliflower instead!
Garlic Parmesan Roasted Cauliflower: You will love this tasty garlic parmesan roasted cauliflower! It’s the perfect low-carb side dish for any meal.
Spicy Chicken with Cauliflower Rice: Made in one pan, this spicy chicken with cauliflower rice will leave you feeling full but not weighed down.
Mushroom Cauliflower Rice Skillet Recipe: This mushroom cauliflower rice skillet is perfect for dinner on a busy weeknight. It comes together in 20 minutes.
Easy Cauliflower Fried Rice Recipe: Just as tasty as fried rice but without the carbs! This cauliflower fried rice comes together quickly and easily.

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