Broccoli And Cauliflower Casserole

Broccoli And Cauliflower Casserole recipe

"We independently review the products we recommend! When you buy through links on, We may earn an affiliate commission. Learn more"

Combining the robust flavors of broccoli and cauliflower creates a sensational potluck casserole that is both scrumptious and wholesome. This dish satisfies your hunger and nourishes your body with essential vitamins and minerals. I love serving this delightful casserole to my guests as it is a perfect dinner idea with a healthy twist. Plus, it is effortless to customize and make it according to your taste buds.

You can combine this vegan potluck recipe with two similar dishes to add more variety to your meals. One option is to pair it with a roasted vegetable salad with a tangy vinaigrette dressing. The other option is to serve it with a creamy butternut squash soup that complements the casserole flavors beautifully.

Why Would You Like Broccoli and Cauliflower Casserole?

  • This loaded casserole contains cauliflower and broccoli as the main ingredients, and they are easy-to-find ingredients that you can easily make at home without any problem.
  • The recipe is a filling meal with 5.8g carbs, and you will feel full without consuming extra carbs and maintain a healthy diet.
  • It is an easy-to-make recipe and doesn’t require much time to prepare. You can make it instantly on weeknight dinners without heavy preparation and time for cooking.
  • This casserole is crowd-pleaser and family-friendly—the perfect way to feed the kids with natural and healthy ingredients.
  • All the vegetables in this dish are highly nutritious and rich in minerals and vitamins.
  • A perfect addition to a picnic meal or as a side dish on a Sunday supper.
  • 100% vegan dinner that can be prepared with minimal efforts.
  • Highly customizable – you can also make this recipe lactose-free and gluten-free.
Broccoli And Cauliflower Casserole
Broccoli And Cauliflower Casserole

Ingredients For Broccoli And Cauliflower Casserole

Here is the list of ingredients that you will need to make the broccoli and cauliflower casserole;

For Casserole

  • 1 head of large broccoli
  • 1 large cauliflower
  • 800g Potatoes
  • 1 carrot round chopped
  • 1 red onion, finely chopped
  • 2 cloves of minced garlic
  • ¼ tsp of salt
  • ½ tsp of black pepper
  • ¼ tsp paprika
  • Monterey jack cheese according to taste
  • 1 cup Mozzarella cheese
  • 1/3 seasoned breadcrumbs.

For Sauce

  • 100g butter
  • 3 tbsp all-purpose flour
  • 500ml vegetable or chicken stock
  • Milk 100ml
  • 1 tsp salt
  • 2 tsp of basil
  • French herbs

Ingredients Notes And Alternative Options

  • Cauliflower: Ensure taking an entire head of cauliflower. You can find some medium-sized heads of cauliflower and make sure there are no brown spots in the vegetable. Remove the leaves and cut the core before the flowers.
Broccoli And Cauliflower Casserole-1
  • Broccoli: Take 2 large broccoli head crowns of 1 pound.
Broccoli And Cauliflower Casserole-3
  • Olive oil: If you want to maintain your diet, make this in lower unsaturated fat. It is better to use olive oil instead of butter. This helps you in making the vegetable brown and crispy.
  • Leek: You can also add leek to add variation to the dish. Add the white and light green parts and chop them off completely. You can also make chicken stock with its help.
  • Salt: Add according to your taste; you are free to add kosher salt.
  • Flour: Try to use gluten-free all-purpose flour.
  • Milk: Use regular milk or lactose-free milk; this will keep the calories lower; using skim milk will also work the same.
  • Cheddar cheese: Take the sharpest cheddar cheese to add the perfect cheese flavor to your dish.
  • Paprika and Garlic Powder: Add breadcrumbs or a combination of garlic powder and paprika to the casserole.

How To Make Broccoli and Cauliflower Casserole?

Here is the step-by-step guide to making broccoli and cauliflower casserole;

Step 1: Prepare the Ingredients

Start making the casserole by boiling a large pot with salt and a bowl of ice water, ready to use.

Step 2: Boil the Vegies

Broccoli And Cauliflower Casserole-4

Add the evenly chopped potato, cauliflower, and broccoli into the boiling water. Boil 10 minutes, strain the water, and then transfer the veggies into an ice bath. After a detailed ice bath, drain the vegetables and reserve the bowl for mixing.

Step 3: Chop Onions and Carrots

Take a red onion and chop it lengthwise, chop the carrots into a round shape.

Add onions and carrots into a frying pan with 2 tbsp of oil. Sautee the vegetables for 5 minutes, and set them aside.

Broccoli And Cauliflower Casserole-6

Step 4: Make the Sauce

Broccoli And Cauliflower Casserole-11

It’s time to make the sauce; take two tbsp of olive oil or 100g of butter in a pan and melt it on medium flame.

Broccoli And Cauliflower Casserole-8

Now mix the flour into the butter and mix it thoroughly.

When flour absorbs all of the butter, it is time to add the vegetables or chicken broth. You can also add leek for this step and ¾ tsp of salt. Stir and cook for 5 minutes until the leek is soft.

Broccoli And Cauliflower Casserole-9

Step 5: Add Milk and Boil

Add milk and bring it to a boil; keep the pan on high heat and stir constantly. Cook for 2 minutes and wait until bubbles start to show. Add paprika and garlic, basil, salt, and French herbs to this sauce and cook for 1 more minute.

Step 6: Mix Cheese and Pepper

Broccoli And Cauliflower Casserole-10

Add some cheese to the pan and wait until it melts thoroughly. Remove the sauce from the heat and mix the pepper with the cheese until both melt entirely, and you can see the sauce.

Step 7: Cover the Vegies with Sauce

Take the dish with all the vegetables, including cauliflower, broccoli, red onion, and carrots, and start adding the sauce on top of the dish.

Broccoli And Cauliflower Casserole-7

Cover the whole surface and mix the sauce into the veggies thoroughly.

Broccoli And Cauliflower Casserole-12

Take the cube of mozzarella cheese and sprinkle some on the top of the tip.

Broccoli And Cauliflower Casserole-13

Step 8: Bake the Casserole

Broccoli And Cauliflower Casserole-14

Preheat the oven to 350°F. It’s time to bake the casserole in a preheated oven for 25-30 minutes; serve it after cooling it for 15 minutes before serving.

Broccoli And Cauliflower Casserole recipe

Expert Tips to Make the Best Broccoli and Cauliflower Casserole

  • If you like your cheese golden brown on top of the casserole, you can turn on the broiler for 3 minutes and keep an eye on it to prevent it from burning.
  • It is better to use homemade cheese, you may have to put some extra work into it, but it is way better than store-bought cheese which has a powder coating, and forms clumps while shredding.
  • You can also use frozen florets if you don’t have fresh cauliflower and broccoli florets.
  • There are various ingredients and other vegetables that you can use, and they make a perfect addition to your dish. These vegetables include; leek, shallots, and green onions.
  • If you want to increase the crispiness of the dish, you can add breadcrumbs on top of the casserole, making the dish crispier.
  • Ensure cutting the broccoli and cauliflower florets in equal parts to cook the dish evenly.

How To Store Broccoli and Cauliflower Casserole?

If you have a leftover casserole, you can keep it at room temperature for a few hours if the room temperature is average. But, if you want to store it for a few days, you need to add it inside an airtight container, and then you can keep your casserole inside the fridge for 2 to 3 days and not more than that. If you take it out within 2 to 3 days, you can devour it by heating it inside the oven.

How To Freeze Broccoli and Cauliflower Casserole?

If you want to keep your casserole for over 3 days, it is best to freeze it. You can freeze your casserole by adding it inside the airtight container and then in the freezer. The casserole can stay inside the freeze for 2 to 3 months approximately. But there are chances that the casserole will spoil or change its texture or flavor over this long time.

Reheating Instructions

If you want to reheat your casserole after taking it out of the refrigerator, you must microwave it for a few minutes. The casserole will be as good as new, but if you take it out of the freezer, you must reheat it in the oven.

Alternative Ingredients You May Try for Variation

You can also add the following ingredients inside this casserole to add a variation;

  • 8 slices of bacon, fried and crispy
  • ½ cup of sour cream
  • ½ cup of cream cheese
  • 1 tbsp of mayo
  • Some leek
  • One package of seasoned crushed croutons.

Alternative / Side Recipes

If you are looking for the best cabbage side dishes that go with this casserole recipe, there are many options for you, and some of them include;


Can This Cauliflower and Broccoli Casserole Be Made Gluten-Free?

Yes, you can make this gluten-free casserole; for this purpose, you need to make the sauce in a different technique. Cook the leeks and then add skim milk and heat properly. Add cornstarch mixed with water into it and keep on mixing correctly. Remove from heat, and then add the cheddar and mozzarella cheese.

Can This Casserole Be Made Lactose-Free?

You can make this lactose-free casserole using Lactaid or organic valley lactose-free milk and Cabot cheddar. All these ingredients are lactose-free and will make your recipe lactose-free.

Can Other Vegetables Be Substituted?

Yes, you can substitute vegetables; you can use just cauliflower and broccoli or other vegetables such as Brussels sprouts and blanch them for 5 minutes, whatever you choose.

Is This Casserole High in Carbs?

The broccoli and cauliflower casserole is a low-carb, gluten-free, and keto-friendly diet. All the ingredients are naturally gluten-free, so you don’t need to worry about this recipe is high in carbs. It is healthy and nutritious without disturbing your healthy diet.

Broccoli And Cauliflower Casserole recipe

Broccoli And Cauliflower Casserole

Muhammad Kashif
The broccoli and cauliflower casserole recipe is a hit recipe, and you can top it with croutons to give it a perfect crunchy texture that everyone will love. The sauce filled with creamy cheddar and mozzarella cheese is perfect.
4.75 from 4 votes
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Course Main Course, Side Dish
Servings 12 people


For Casserole

  • 1 head of large broccoli
  • 1 large cauliflower
  • 800 g Potato
  • 1 carrot round chopped
  • 1 red onion, finely chopped
  • 2 cloves of minced garlic
  • ¼ tsp salt
  • ½ tsp black pepper
  • ¼ tsp paprika
  • Monterey jack cheese according to taste
  • 1 Mozzarella cheese
  • seasoned breadcrumbs

For Sauce

  • 100 g butter
  • 3 tbsp all-purpose flour
  • 500 ml vegetable or chicken stock
  • 100 ml Milk
  • 1 tsp salt
  • 2 tsp basil
  • French herbs according to taste

How to Make?

  • Add the evenly chopped potato, cauliflower, and broccoli into the boiling water. Boil 10 minutes, strain the water, and then transfer the veggies into an ice bath.
  • Chop onions, carrots, and other side vegetables, sauté them for 5 minutes and set them aside.
  • Make the sauce by melting butter and adding other ingredients, including leek, flour, and chicken broth.
  • Add cheese, milk, and seasonings to the sauce to make it thick and creamy.
  • Now take all the vegetables in a bowl and add the sauce. Sprinkle some seasoning, and bake the dish in a preheated oven at 350°F for 25-30 minutes. Your casserole is good to go.


Serving: 1dishCalories: 250kcalCarbohydrates: 19gProtein: 11gFat: 15gSaturated Fat: 9gMonounsaturated Fat: 4gTrans Fat: 1gCholesterol: 40mgSodium: 805mgPotassium: 320mgFiber: 2gVitamin A: 671IUVitamin C: 42mgCalcium: 270mgIron: 1mg
Tried this recipe?Take a Picture and tag us at instagram via @theladychefofficial
Muhammad Kashif is a passionate chef and a talented writer who has dedicated his life to the world of culinary arts. With years of experience, he shares insights on the latest kitchen gadgets and appliances, alongside delicious and easy-to-follow recipes for any skill level. Join Muhammad on his culinary journey and discover new ways to make your kitchen the heart of your home.