Hearty and comforting, cauliflower casserole is the perfect keto side or meatless main dish!

Cauliflower florets are blended with a creamy, two cheese sauce and baked until golden brown and bubbly!

The best part is that it’s so easy to make!

Cheesy Cauliflower Casserole in a dish

Cheesy Low Carb Side Dish!

  • Cheesy cauliflower casserole is a healthy, wholesome addition to any gathering and can also be served as an appetizer. Even the pickiest kids will love its cheesy goodness!
  • Make it a main and add sliced summer sausage, diced ham, bacon crumbles, or leftover chicken.
  • Double up the recipe and serve it as a low-carb mac & cheese copycat recipe all week long! The flavors will continue to blend.
pouring cheese case into a dish for Cheesy Cauliflower Casserole

Ingredients and Variations

Cauliflower – Cut florets into uniform, bite-sized pieces so each bite is loaded with cheesy cauliflower!

Cheese Sauce – Heavy cream, cream cheese, parmesan, and cheddar cheeses are all low-carb and have loads of flavor! Make it a bold cheesy casserole by mixing in some buffalo sauce or a few dashes of sriracha!

Variations – Broccoli florets, sliced mushrooms, Brussels sprouts, green beans, or any keto-friendly veggies can be added to this cauliflower casserole!

How to Make Cauliflower Casserole

  1. Boil cauliflower pieces, and drain well.
  2. Cook cream, cream cheese, and butter over medium heat until it’s smooth.
  3. Whisk seasonings into the cheese sauce and bring it to a boil (per recipe below).
  4. Remove from heat and stir in parmesan and 1 ¼ cup of cheddar cheese.
  5. Place cauliflower in a baking pan and pour in cheese sauce. Top with remaining cheese and bake until bubbly.
Cheesy Cauliflower Casserole before being baked

Tips for the Best Cheese Sauce

  • Soften cream cheese to room temperature before adding to the recipe in Step 3.
  • Block cheddar cheese will melt better than pre-shredded because pre-shredded has anti-caking agents in it that will inhibit melting.
  • This easy cheese sauce is a perfect topper over zucchini, broccoli, or Brussels sprouts! You can also stir it into cauliflower rice for a cheesy rice side dish!

Serving and Storing

Serve cheesy cauliflower casserole as a side dish to baked chicken breast, pan-seared pork chops or pork tenderloin, or a savory and juicy low-carb meatloaf.

Keep leftover cheesy cauliflower casserole covered in the refrigerator for up to 4 days. Reheat on the stovetop or in the microwave with a little milk to loosen up the cheese sauce. Freeze portions in zippered bags for up to 1 month, but be aware the texture might change a little. Blend cheesy cauliflower into a cozy and creamy soup or make it into loaded cauliflower mash.

Close up of cheesy cauliflower casserole in a clear baking dish

Must-Try Cauliflower Recipes!

Have you tried this Cheesy Cauliflower Casserole recipe? Leave a comment and rating below!

baked Low Carb Cheesy Cauliflower Casserole
5 from 16 votes↑ Click stars to rate now!
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Cheesy Cauliflower Casserole

This irresistibly cheesy cauliflower casserole is a cinch to make!
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 6 servings
Author Holly


  • 1 head cauliflower
  • 1 cup heavy cream
  • ¼ cup cream cheese
  • 1 tablespoon butter
  • ½ teaspoon dry mustard powder
  • ½ teaspoon onion powder
  • pinch cayenne pepper
  • ¼ cup parmesan cheese
  • 1 ½ cups sharp cheddar cheese divided


  • Preheat oven to 375°F.
  • Cut cauliflower into bite sized pieces. Boil 4-5 minutes or until tender crisp. Place in a strainer and drain very well.
  • Add heavy cream, cream cheese and butter to a saucepan and stir over medium heat until smooth and cream cheese is melted.
  • Add dry mustard powder, onion powder and cayenne pepper. Bring to a boil then cook 2 minutes while whisking.
  • Remove from heat, stir in parmesan and 1 ¼ cups cheddar cheese.
  • Place in a 9×9 inch baking pan and top with remaining ¼ cup cheese. Bake 20-25 minutes or until golden.


  • Bring cream cheese to room temperature, or microwave for 20 seconds to soften before adding to the recipe.
  • Shred block cheddar cheese as it will melt better than pre-shredded cheese. Pre-shredded has anti-caking agents in it that will inhibit melting. 
  • Refrigerate leftover cauliflower casserole in a covered container for up to 4 days.
  • Reheat leftovers on the stovetop or in the microwave.
  • Freeze cooked and cooled cauliflower casserole in zippered bags for up to 1 month. The texture may not be the same, but perfect to blend into a soup.
5 from 16 votes↑ Click stars to rate now!
Or to leave a comment, click here!

Nutrition Information

Calories: 321kcal | Carbohydrates: 3g | Protein: 10g | Fat: 30g | Saturated Fat: 18g | Cholesterol: 102mg | Sodium: 309mg | Potassium: 123mg | Fiber: 0g | Sugar: 0g | Vitamin A: 1085IU | Vitamin C: 8.8mg | Calcium: 292mg | Iron: 0.3mg

Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.

Course Main Course
Cuisine American

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About the author

At Easy Low Carb® we believe that every meal should be full of big bold flavor! From amazing main dishes and simple sides to the best party snacks, reducing carbs doesn’t mean giving up your favorites!
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    1. Hi Roberta, this cheese sauce should last 3-4 days in the fridge. Just be sure to store in an airtight container and reheat only the portion you intend to use. Enjoy!

    1. Thank you for sharing Scott! We always recommend calculating it with the ingredients/brands you used, as nutrition can change based on that information!

  1. 5 stars
    I do not like mustard even mustard Powder. Will it make a big difference if I omit this do I need to add anything else in place?

    1. Omitting the mustard powder won’t make a huge difference but if you would like to substitute it Tumeric will give you the same flavor profile without the mustard taste!