This cauliflower casserole is cooked cauliflower florets tossed in a homemade cheese sauce, then mixed with bacon and green onions and baked to golden brown perfection. A hearty side dish that pairs well with chicken, pork and beef.

I’m always looking for new ways to dress up ordinary veggies. Some of my favorite options include sauteed brussels sprouts, honey roasted carrots and this loaded cauliflower casserole.

A spoon serving up a portion of cauliflower casserole.

Cauliflower is one of my all time favorite vegetables. It’s inexpensive, available year round, packed with nutrition, and pairs will with so many different flavors. This cauliflower casserole has it all – fork tender vegetables, smoky bacon and plenty of cheese.

Try this casserole for the Thanksgiving or Christmas and enjoy it with a spiral ham, Cajun turkey or honey glazed ham. If you’re making a holiday meal, don’t forget the pecan pie cheesecake for dessert!

Cauliflower Casserole Ingredients

To make this delicious cauliflower casserole you will need cooked cauliflower florets, butter, minced garlic, flour, whole milk, grated parmesan cheese, shredded cheddar cheese, cooked bacon, green onions, salt and black pepper.

  • Cauliflower: Cauliflower is the heart of this dish so you want to find nice fresh cauliflower with an even white color without brown spots or blemishes. You want firm cauliflower that is not soft or mushy. Avoid cauliflower that has a strong smell.
  • Butter: I use butter for this dish to make a roux and give a rich flavor to the cheese sauce.
  • Cheese: The cheese sauce is what makes this dish so wonderful. I use cheddar cheese to build the base of the cheese sauce with parmesan cheese to give the sauce a little extra salty, savory flavor.
  • Green Onions: Look for green onions that are a nice green color and firm. I think green onions with a smaller width tend to chop better and hold up better in this casserole.
  • Bacon: You will need cooked and crumbled bacon for this casserole. I typically use cooking shears to cut raw bacon into small squares and then cook those squares in a pan until crisp.
Cooked cauliflower florets in a bowl.

How To Cook Cauliflower

You’ll need to cook your cauliflower for this casserole, and there are a few different techniques you can use. I typically just blanch my cauliflower, but any of these methods will work just fine. Keep in mind that the cauliflower will continue to cook as it bakes in the casserole, so be careful not to overcook it initially!

  • Blanch: Bring a large pot of salted water to a boil. Add the cauliflower florets and cook for 4 minutes or until just tender. Drain the cauliflower and place it in a bowl of ice water to stop the cooking process. Pat dry, then proceed with the casserole.
  • Steam: Heat 1 inch of water to boiling salted water in a shallow pan. Add the cauliflower in a single layer. Cover the pan and cook for 5-6 minutes or until cauliflower is just tender. Remove the cauliflower from the pan.
  • Roast: Heat your oven to 425 degrees F. Coat the cauliflower florets with 1 tablespoon of olive oil and season with salt and pepper to taste. Place the florets on a greased sheet pan in a single layer. Cook for 15-20 minutes until tender.
Florets tossed with cheese sauce, bacon and green onions in a dish.

How Do You Make Cauliflower Casserole?

To make this cauliflower casserole recipe, first make sure you have cooked cauliflower and bacon then preheat your oven.

Next, prepare a cheese sauce by mixing together butter, garlic and flour to make a roux. Add milk and whisk constantly until the sauce mixture thickens. Sprinkle in salt and pepper. Stir in shredded cheddar cheese and grated parmesan cheese.

Toss your cooked cauliflower with the cheese sauce. Add some cooked bacon bits and green onions, then pour the cauliflower mixture into a prepared casserole dish. Add a layer of shredded cheese, then bake until golden brown.

The finishing touch is an additional sprinkle of bacon and green onions. All that’s left is to serve and enjoy!

Florets in a baking dish, topped with shredded cheese.

Tips For The Perfect Cauliflower Casserole

  • I recommend shredding your own cheese for this dish. The pre-shredded cheese in bags at the grocery store is often coated in preservatives and anti caking agents and does not melt smoothly.
  • I have made this casserole with both fresh and frozen cauliflower, and either works just fine. If you’re using frozen cauliflower, be sure to thaw it and remove any excess water before proceeding with the recipe.
  • This dish can be assembled up to 8 hours before you plan to bake it. Cover and store in the fridge until you’re ready to put it in the oven.
  • You can use different colors of cauliflower like green, orange or purple! You could even make this dish with Romanesco!

Quick Tip

Cook your cauliflower until it is just tender before starting this recipe. It will continue to cook in the baking dish.

Cauliflower casserole topped with melted cheese, bacon and green onions.

Recipe FAQs

How to prepare cauliflower?

To prepare your cauliflower for cooking, wash the cauliflower head and pat it dry. Remove any green leaves. Place the head on a cutting board stem side down and cut it into quarters with a sharp knife. Cut each quarter to remove the stem and separate the florets. You may need to cut apart individual florets or break them apart by hand.

How long will cauliflower casserole stay good?

Cauliflower casserole will stay fresh in an airtight container in the refrigerator for up to 3 days. This recipe is not a great candidate for the freezer, as the cheese sauce may separate and the cauliflower can become watery upon thawing.

Follow Me

Flavor Variations

This cauliflower casserole dish is fabulous as-is, but you can absolutely add other ingredients to customize it to your tastes.

  • Protein: Make this a main course by adding diced cooked chicken, diced cooked steak or sliced smoked sausage. You can also swap out the bacon for cubes of ham.
  • Cheese: Use your favorite type of cheese for a cheesy cauliflower casserole! Some great options include Monterey Jack cheese, sharp cheddar cheese, Swiss cheese, pepper jack cheese, Colby Jack cheese or mozzarella cheese.
  • Veggies: Instead of cauliflower, try broccoli or diced cooked potatoes. You can even do a combination of vegetables to add extra flavor.
  • Toppings: Feel free to add more toppings such as buttered panko breadcrumbs, fresh chives or French fried onions.
  • Creamy: Add 1/2 cup of sour cream or cream cheese when you stir in the cheddar cheese and parmesan cheese.

This cauliflower casserole is easy enough to put together on a busy weeknight, but is elegant enough to earn its place on a holiday meal table. You just can’t go wrong with this one!

More Great Side Dishes

Cauliflower Casserole Video

Love This Recipe?

Please leave a 5-star 🌟🌟🌟🌟🌟 rating in the recipe card below & a review in the comments section further down the page.

5 from 26 votes

Cauliflower Casserole

AuthorSara Welch
A spoon serving up a portion of cauliflower casserole.
This cauliflower casserole is cooked cauliflower florets tossed in a homemade cheese sauce, then mixed with bacon and green onions and baked to golden brown perfection. A hearty side dish that pairs well with chicken, pork and beef.
Time
Prep Time20 minutes
40 minutes
Total Time1 hour
Course Side
Cuisine American
Serves 8

Ingredients 

  • 6 cups cauliflower florets cooked
  • 3 tablespoons butter
  • 1 tablespoon garlic minced
  • 3 tablespoons all purpose flour
  • 2 cups milk I use whole milk
  • salt and pepper to taste
  • 1/2 cup parmesan cheese grated
  • 2 1/2 cups shredded cheddar cheese divided use
  • 8 slices bacon cooked and crumbled, plus more for garnish
  • 1/4 cup green onions sliced, plus more for garnish
  • cooking spray

Instructions 

  • Preheat the oven to 375 degrees F. Coat a 3 quart baking dish with cooking spray.
  • Melt the butter over medium heat in a large pan. Add the garlic and cook for 30 seconds.
  • Add the flour and cook for 1 minute, stirring constantly.
  • Gradually add in the milk, whisking constantly. Season with salt and pepper to taste, then bring the milk mixture to a simmer.
  • Cook for 4-5 minutes, stirring occasionally, or until thickened. Stir in the parmesan cheese and 1 1/2 cups of cheddar cheese.
  • Add the cauliflower to the cheese sauce and toss to coat. Stir in the bacon and green onions.
  • Pour the cauliflower mixture into the prepared baking dish and top with remaining cup of cheddar cheese.
  • Bake for 25-30 minutes or until casserole is bubbly and cheese is melted. Let stand for 5 minutes, then serve, garnished with additional bacon and green onions as desired.

Notes

  1. I recommend shredding your own cheese for this dish. The pre-shredded cheese in bags at the grocery store is often coated in preservatives and anti caking agents and does not melt smoothly.
  2. Cook your cauliflower until it is just tender before starting this recipe. It will continue to cook in the baking dish.
  3. I have made this casserole with both fresh and frozen cauliflower, and either works just fine. If you’re using frozen cauliflower, be sure to thaw it and remove any excess water before proceeding with the recipe.

Nutrition

Calories: 336kcal | Carbohydrates: 10g | Protein: 16g | Fat: 20g | Saturated Fat: 14g | Cholesterol: 66mg | Sodium: 508mg | Potassium: 390mg | Fiber: 2g | Sugar: 5g | Vitamin A: 601IU | Vitamin C: 37mg | Calcium: 368mg | Iron: 1mg

Hello! I’m Sara!

Learn more about Sara

Related Posts

Free Bonus

5 Secrets to Meal Planning + Free Toolkit!

5 from 26 votes (16 ratings without comment)

Leave a comment

Your email address will not be published. Required fields are marked *

Recipe Rating




Comments

  1. 5 stars
    Fantastic recipe! I’ve been trying to get my kids to eat healthier and they had no idea this was made with cauliflower…LOL!