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Home / Side Dishes

Broccoli Cauliflower Casserole

This wonderfully cheesy side dish makes vegetables the star of the show at your dinner table.

Erren Hart

|

last Updated:

01/11/2021
4.74 from 15 votes
Jump to Recipe
Serves: 4
Prep: 10 minutes mins
Cook: 1 hour hr
Cheesy Broccoli and Cauliflower Bake fresh out of the oven in the pan
Two images showing a cheese sauce being mixed and the completed cheesy broccoli and cauliflower casserole with melty cheese sauce on top.
Cheesy Broccoli and Cauliflower Bake fresh out of the oven in the pan

Cheesy Broccoli and Cauliflower Bake fresh out of the oven in the pan

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This recipe for Broccoli Cauliflower Casserole is an easy yet indulgent side dish that’s a real crowd-pleaser!  

Cheesy Broccoli and Cauliflower Bake fresh out of the oven in the pan
Pin This Recipe For Later!

After making my Stovetop Mac and Cheese, I thought – wait a minute, I could make this super easy version with vegetables too, and it doesn’t have to be a lot of work. Broccoli Cauliflower Casserole was born!

Side dishes need never be boring, and this recipe is an example of how to create a tasty side dish everyone will crave. Easy and delicious!

This dish is so good that kids and adults will love it and ask for it time and time again! It is so versatile that it compliments any main meal, why not serve with Creamy Mushroom Chicken and Best Ever Mashed Potatoes for the ultimate midweek feast? You can even serve this as a vegetarian main dish!

Why This Recipe Works

  • Steaming the broccoli and cauliflower ensures even cooking time and helps to hold in the flavor of the vegetables.
  • A good quality cheddar cheese makes your sauce super-tasty without adding extra flavorings.
  • The addition of garlic powder and paprika gives the sauce a subtle, extra special flavor.

What are the benefits of broccoli and cauliflower?

Both cauliflower and broccoli are extremely low in calories but are also packed full of nutrients.

Cauliflower is high in fiber, vitamins, and minerals. It contains a little of almost every vitamin and mineral that you need daily.

Broccoli is a very good source of fiber and protein and contains iron, potassium, calcium, selenium, and magnesium as well as vitamins A, C, E, K, and lots B vitamins including folic acid. When these vegetables are steamed (not boiled) this helps preserve all these amazing health benefits.

How to make broccoli cauliflower casserole

  1. Steam your broccoli and cauliflower, set aside.
  2. Make the cheese sauce.
  3. Place vegetables in an oven-safe dish and cover with the cheese sauce. Sprinkle shredded parmesan over the top.
  4. Bake for 45 minutes to an hour (until the topping is golden).
  5. Serve and enjoy!

Step by Step Instructions.

Mix cheddar cheese and parmesan in a dish with cornstarch. Set aside.

A pot with the cheese being mixed into the milk mixture.

Melt butter in a pan.

Butter melting in a pan

Stir in evaporated milk, paprika, and garlic powder. Add the cheese mixture. Stir until combined and it reaches a silky texture.

The Parmesan Cheese added to the pan with the milk mixture

Pour the cheese sauce over the broccoli and cauliflower.

You can use or frozen broccoli and cauliflower: Make sure that you thaw it and drained well before cooking.

a close up of the broccoli and cauliflower coated in the thick cheese sauce

Add to an oven-safe dish and top with shredded parmesan cheese.  Bake 45 minutes to an hour or until golden and cooked through.

Serve and enjoy!

Cheesy Broccoli and Cauliflower Bake fresh out of the oven in the pan

Tips and variations

  • Always use a good quality cheddar to make a cheese sauce, it really makes a difference to the taste!
  • When steaming the cauliflower, steam until slightly tender, but not soft. It will finish cooking in the oven.
  • Have all the ingredients ready before you begin the sauce.  Being prepared makes everything go more smoothly.
  • For an extra kick of flavor, use mature cheddar.
  • Add a breadcrumb topping to give the dish extra texture.

Other Indulgent Sides

  • Bacon Wrapped Sausage Stuffing
  • Cheesy Cauliflower Casserole
  • Roasted Potatoes
  • Creamed Spinach
  • Oven Roasted Asparagus

Make ahead and Freezing Instructions

  • To Make ahead: Make the sauce, cover the veggies. This dish can be kept in the refrigerator for two days.  When ready just bake!
  • To freeze: Make the mixture and put it into an airtight, oven-safe dish, freeze for up to 3 months.  Thaw and add to a casserole dish, and bake.

Rate This Recipe

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Cheesy Broccoli and Cauliflower Bake fresh out of the oven in the pan

Recipe

Broccoli Cauliflower Casserole

This wonderfully cheesy side dish makes vegetables the star of the show at your dinner table.
4.74 from 15 votes
Print
Prep Time: 10 minutes mins
Cook Time: 1 hour hr
Total Time: 1 hour hr 10 minutes mins
Serves 4

Ingredients

  • 2 tablespoons butter
  • 1½ cups sharp cheddar cheese (shredded )
  • ½ cup parmesan cheese (shredded)
  • 1 tablespoon cornstarch
  • 12 oz evaporated milk ((1 can))
  • 1 teaspoon garlic powder
  • 1 teaspoon paprika
  • 8 ounces broccoli and cauliflower florets (steamed until just underdone)
  • ⅛ cup Parmesan cheese (shredded (to sprinkle on the top))

Instructions

  • Preheat the oven to 350F/180C
  • Steam your broccoli and cauliflower. Set aside.
  • In a large bowl, combine both kinds of cheese, and cornstarch – set aside.
  • In a large saucepan, melt butter on medium heat. Stir in evaporated milk, garlic powder, and paprika.  
  • Add the cheese mixture and stir until the cheese has melted (about 2-3 minutes) and the mixture becomes a thick, smooth sauce.
  • Remove from heat, add the broccoli & cauliflower into the sauce and toss to coat.  Add to an 8-inch oven safe dish.
To make the topping:
  • Top with the grated Parmesan cheese
  • Bake 1 hour, or until golden and cooked through.

Tips

  • Always use a good quality cheddar to make a cheese sauce, it really makes a difference to the taste!
  • When steaming the cauliflower, steam until slightly tender, but not soft. It will finish cooking in the oven.
  • Have all your ingredients ready before you start the sauce.  Things move fast when making the sauce.  If you have to stop to grate cheese, it could end in disaster.
  • For an extra kick of flavor, use mature cheddar.
  • Add a breadcrumb topping to give the dish extra texture.
  • You can use or frozen broccoli and cauliflower that’s thawed and drained well in place of steamed fresh.
 
Show Nutrition Hide Nutrition

Nutrition

Calories: 423 | Carbohydrates: 15g | Protein: 23g | Fat: 30g | Saturated Fat: 19g | Cholesterol: 95mg | Sodium: 672mg | Potassium: 501mg | Fiber: 1g | Sugar: 10g | Vitamin A: 1171IU | Vitamin C: 29mg | Calcium: 725mg | Iron: 1mg
Created by Erren Hart
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Update Notes:  This recipe was originally posted in 2014, but was updated in 2017 with slight changes to the recipe as well as including step by step photos as well as nutritional information.

4.74 from 15 votes (8 ratings without comment)

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20 responses

  1. Dorothy Reinhold Avatar
    Dorothy Reinhold
    06/14/2019

    It is easy to see why this is a family favorite! I love that topping!

    Reply
  2. Amanda Avatar
    Amanda
    06/13/2019

    This looks so delicious I can’t wait to try it !!

    Reply
  3. Kim Seghers Avatar
    Kim Seghers
    06/13/2019

    This recipe looks so cheesy and delicious. I need to make it for my mom she would love it. She loves broccoli and cauliflower,

    Reply
    1. Erren's Kitchen Avatar
      Erren’s Kitchen
      06/16/2019

      I hope your Mum loves this Kim!

      Reply
  4. Debra Attinella Avatar
    Debra Attinella
    06/13/2019

    I’m always looking for new side dishes to make. This one looks great and I’ll be trying it soon!

    Reply
    1. Erren's Kitchen Avatar
      Erren’s Kitchen
      06/16/2019

      Thank you Debra!

      Reply
  5. Demeter Avatar
    Demeter
    06/13/2019

    I can see why this is always a hit! So cheesy and perfect.

    Reply
  6. Roxanne Leonard Avatar
    Roxanne Leonard
    04/21/2019

    I made it to bring to an Easter pot
    luck dinner today. The sauce tasted great and I did steam my veggies, also tossed in carrots. Waiting for the topping to brown then I’m off and running to my dinner.

    Reply
    1. Erren's Kitchen Avatar
      Erren’s Kitchen
      04/23/2019

      Touch base and let me know when you’ve finished how it worked out for you!

      Reply
  7. Lauren Avatar
    Lauren
    10/16/2018

    Curious about using fresh broccoli and cauliflower instead of frozen.

    Reply
    1. Erren Avatar
      Erren
      10/16/2018

      It would work, but you might want to steam them first.

      Reply
  8. Melanie Villanueva Avatar
    Melanie Villanueva
    11/23/2016

    Hello! This looks great! Can you make this ahead of time for Thanksgiving?

    Reply
    1. Erren Avatar
      Erren
      11/23/2016

      Yes, you can make it ahead and bake it on the day. Hope you enjoy it! Happy Thanksgiving!

      Reply
  9. Kayla Avatar
    Kayla
    11/10/2014

    Hey Erren, I make this all the time and keep forgetting to let you know! I’m making it for Thanksgiving! Thanks for sharing!

    Reply
    1. Erren Avatar
      Erren
      11/10/2014

      Hi Kayla! Thanks so much for letting me know. It’s always nice to know when people enjoy my recipes! 🙂

      Reply
  10. Healing Tomato Avatar
    Healing Tomato
    06/13/2014

    This looks so good! Talk about comfort food! I love the recipe and can’t wait to try it.

    Reply
    1. Erren Avatar
      Erren
      06/19/2014

      Thank you Rini! 🙂

      Reply
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