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You are here: Home / Course / Side Dishes / Broccoli Cauliflower Casserole

Broccoli Cauliflower Casserole

By: Melissa Erdelac · On: March 23, 2021 · Updated: March 15, 2022

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Broccoli Cauliflower Casserole pinterest pin

Easy Broccoli Cauliflower Casserole is cheesy baked gluten-free broccoli casserole loaded with fresh or frozen veggies in a creamy sauce. This keto, low carb recipe is quick to throw together, plus make-ahead and freezer-friendly!

close up of melted cheese on broccoli and cauliflower in a casserole dish

Cheesy Broccoli Cauliflower Casserole is easy enough to throw together for a weeknight meal side dish, but also a family favorite at holiday gatherings. It makes a great accompaniment to side dish for ham, roast turkey, or baked chicken.

This recipe takes minutes to throw together, but if you are prepping for a Thanksgiving, Christmas, or Easter meal, veggie casserole can be refrigerated for a day before baking or frozen. 

Since the recipe contains no bread crumbs or panko, it also serves as a decadent gluten-free broccoli casserole. Simply leave out the cauliflower and double up on the amount of broccoli! 

If you love the combination of broccoli and cheese (who doesn’t?!), try Chicken and Broccoli Pasta Bake, Baked Broccoli and Cheese, or Instant Pot Broccoli Cheese Soup.

ingredients needed

Use this recipe for cauliflower broccoli casserole to mix and match a variety of veggies! Below are the suggested ingredients, but use any preferred add-ins for a gluten-free vegetable casserole.

  • Fresh broccoli florets – substitute frozen California medley or use pre-chopped broccoli florets as a time saver
  • Fresh cauliflower florets – substitute frozen California medley or use pre-chopped florets
  • Sour cream – regular or light
  • Heavy Cream – for best taste, but milk, half and half, or non-dairy milk may be substituted
  • Shredded sharp cheddar cheese – use freshly grated for best results or try a mixture of cheeses, such as parmesan cheese, gouda, swiss, or mozzarella cheese
  • Garlic powder

How to Make Broccoli Cauliflower Casserole Recipe

(Below shows step-by-step photos and modified instructions. For the complete recipe, along with ingredient amounts, scroll down to the recipe card.)

a baking sheet with roasted cauliflower and broccoli
images showing the casserole being mixed together
  1. Preheat the oven to 450°F. Add the broccoli, cauliflower, olive oil, salt, and pepper to a baking sheet. Toss to combine and then spread out evenly.
  2. Bake for 10 minutes, toss and flip and then bake for 8-10 minutes more, or until barely tender. Remove from oven and set aside.
  3. In a large bowl mix together sour cream, heavy cream, ¾ cup shredded cheese, and garlic powder. Add the veggies and stir gently to combine.
  4. Place in a 2 quart (8X8 inch) baking dish and top with the remaining cheese. Bake for 8-10 minutes longer.

using frozen vegetables

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Because frozen veggies can often be purchased as florets, this can also be a time saver for holiday meal prep.

Substitute the fresh broccoli and cauliflower florets with three 12 ounce bags of California medley or a mixture of frozen broccoli and cauliflower.

Thaw the veggies first and skip the initial roasting on a baking sheet with the olive oil. When mixing the vegetables in cream sauce add the salt and pepper to the mixture as well, but leave out the olive oil.

make-ahead instructions

Make the recipe in its entirety up to the point of baking the second time. Make sure the vegetables have completely cooled before wrapping securely and storing. Refrigerate up to 24 hours or freeze up to 3 months.

Thaw overnight in the refrigerator and set out the casserole to come to room temperature before baking. Add additional 5-10 minutes baking time, or until dish hot and bubbly throughout. 

Click here to see the
step-by-step web story instructions for this recipe!

overhead shot of vegetable casserole in a white oval dish

frequently asked questions

What other veggies can be used?

Yes. Keep the cheesy creamy sauce the same and use any preferred fresh of frozen vegetables in place of the broccoli and cauliflower.

Is this recipe gluten free / low carb / keto?

Yes! Since there are no bread crumbs or crackers on top gluten-free broccoli casserole it is also a keto and low carb recipe. For another easy, low carb side dish, check out Baked Tomatoes with Cheese!

What toppings can be added?

If you don’t need gluten-free vegetable casserole you may add bread crumbs (or gluten free breadcrumbs), crackers mixed with melted butter, french fried onions, gluten-free fried onions, or crushed potato chips (GF). For low carb or keto toppings, try crumbled pork rinds, keto crackers, or chopped nuts.

More gluten-free Casseroles 

  • Tuna Noodle Casserole from Scratch – This homemade, classic recipe is cheesy with a crunchy potato chip topping, contains no condensed soup, and is easily adaptable to make gluten free.
  • Chicken Tetrazzini Casserole – Tender chicken, noodles, and sautéed mushrooms in a creamy wine sauce and topped with golden cheese.
  • Easy Cheese Grits Casserole – Perfect comfort side dish for breakfast, brunch, or even a weeknight dinner.
  • Mexican Tater Tot Casserole – Creamy seasoned ground beef layered under golden crispy tater tots and lots of gooey melted cheese.
a large spoon lifting out broccoli and cauliflower casserole out of a baking dish

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close up of melted cheese on broccoli and cauliflower in a casserole dish

Broccoli Cauliflower Casserole

Easy Broccoli Cauliflower Casserole is cheesy baked gluten-free broccoli casserole loaded with fresh or frozen veggies in a creamy sauce. This keto, low carb recipe is quick to throw together, plus make-ahead and freezer-friendly!
4.11 from 19 votes
Print Pin Rate
Prep Time: 7 minutes minutes
Cook Time: 25 minutes minutes
Total Time: 32 minutes minutes
Servings: 8
Author: Melissa Erdelac

Ingredients

  • 1 pound fresh broccoli florets,
  • 1 medium head cauliflower, cut in florets
  • 2 tablespoons olive oil
  • ½ teaspoon salt
  • ¼ teaspoon pepper
  • ¾ cup sour cream
  • ½ cup heavy cream
  • ¼ teaspoon garlic powder
  • 1 ½ cup freshly shredded grated sharp cheddar, divided
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Instructions

  • Preheat the oven to 450°F. Spray a baking sheet with nonstick cooking spray. Add the broccoli, cauliflower, olive oil, salt, and pepper to the baking sheet. Toss to combine and spread out evenly.
  • Bake for 10 minutes, toss and flip with spatula and then bake for 8-10 minutes more, or until barely tender. Remove from the oven and set aside.
  • Grease a 2 quart (8X8 inch) dish and set aside. In a large bowl mix together sour cream, heavy cream, ¾ cup shredded cheese, and garlic powder. Add the veggies and stir gently to combine.
  • Spread the vegetable mixture into prepared 2 quart baking dish. Top with the remaining ¾ cup cheese. Bake for 8-10 minutes longer. Let the casserole sit for 5 minutes before serving.
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Equipment Needed

  • Baking Dish
  • Baking Sheets
  • Santoku Knife

Recipe Notes

 
Make Ahead Instructions:
Make the recipe in its entirety up to the point of baking the second time. Make sure the vegetables have completely cooled before wrapping securely and storing. Refrigerate up to 24 hours or freeze up to 3 months.
Thaw overnight in the refrigerator and set out the casserole to come to room temperature before baking. Add additional 5-10 minutes baking time, or until dish hot and bubbly throughout. 
 
Using frozen veggies:
Substitute the fresh vegetables with three 12 ounce bags of California medley or a mixture of frozen broccoli and cauliflower florets.
Thaw the veggies first and skip the initial roasting on a baking sheet with the olive oil. When mixing the veggies in cream sauce add the salt and pepper to the mixture as well, but leave out the olive oil.
 
Additional topping ideas:
  • Breadcrumbs (or gluten free bread crumbs)
  • Ritz crackers mixed with melted butter
  • French fried onions or gluten-free french fried onions
  • Crushed potato chips (GF)
  • Crumbled pork rinds (keto / low carb)
  • Chopped nuts (keto / low carb)
 
Inspired by Wholesome Yum
 

Nutrition

Calories: 235kcal | Carbohydrates: 10g | Protein: 9g | Fat: 19g | Saturated Fat: 10g | Cholesterol: 50mg | Sodium: 338mg | Potassium: 474mg | Fiber: 3g | Sugar: 3g | Vitamin A: 855IU | Vitamin C: 86mg | Calcium: 236mg | Iron: 1mg
Course: gluten free side dish, Side Dish
Categories: Baking Christmas Easter Fall Freezer-Friendly Gluten Free Holidays Low Carb Recipes Side Dishes Spring Thanksgiving Vegetables Vegetarian Winter
Previous Post: « Gluten-Free Sugar Cookie Bars (Soft & Chewy)
Next Post: Pineapple Pretzel Salad »

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Comments

  1. Jayme Silvestri says

    October 29, 2021 at 1:11 AM

    Wow, you have such stunning photos! And these stuffed bell pepers – YUM! These have been on my bucket list for so long – thanks for pushing me to finally give it a try!

    Reply

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