Roasted Cauliflower Mac and Cheese Casserole Recipe

Inspired by one of my favorite mac ‘n cheese recipes from America’s Test Kitchen, I wanted to lighten things up a bit for my family while keeping the dish simple and delicious. I also aimed to use as few pots and pans as possible. This roasted cauliflower mac ‘n cheese fits the bill: it’s easy, flavorful, and comes together quickly.

bowl of cauliflower mac 'n cheese with roasted cauliflower on parchment paper with a silver fork

Cauliflower has been a favorite in our kitchen lately, so adding it to a comfort-food classic felt natural. Roasting the cauliflower adds a nutty, caramelized flavor that complements the cheese sauce, and the creamy sauce helps the florets blend in for picky eaters.

If you want to add more vegetables, simply reduce the pasta slightly and roast extra veggies alongside the cauliflower. Broccoli works particularly well with cheese, but feel free to experiment with whatever you like.

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Is this a healthy version of macaroni and cheese?

That depends on your definition of “healthy.” This recipe includes multiple food groups and a generous portion of vegetables, but it still contains butter, cheese, and pasta. For me, balance matters: pairing roasted cauliflower with the richer elements makes it feel lighter without sacrificing comfort.

It’s also a sanity-saving weeknight dinner—ready in about 30 minutes and family-approved. It may not be as light as a salad or grain bowl, but when everyone leaves the table happy, that counts for a lot.

little kids hand reaching for cauliflower from bowl of mac 'n cheese

So while it’s not a “clean-eating” meal, it’s a healthier spin on a favorite and one I’m happy to serve my family.

How can I adapt this to fit my dietary needs?

I didn’t experiment extensively with dairy-free versions since we use dairy regularly, but this recipe adapts easily to gluten-free diets.

Simple gluten-free options:

  1. Make it all cauliflower and skip the pasta—turn it into a veggies-and-cheese bake using spiralized or roasted vegetables.
  2. Use a gluten-free pasta in place of regular pasta.

If you need dairy-free mac and cheese, many bloggers have strong vegan alternatives worth trying.

How do I make cauliflower macaroni and cheese?

Start by roasting the cauliflower. Chop a head of cauliflower into bite-size florets, toss with a tablespoon of olive oil and some salt, and spread on a parchment-lined baking sheet. Roast at 425°F until the cauliflower is slightly caramelized and just tender—think al dente rather than falling apart.

raw cauliflower with olive oil and seasoning

While the cauliflower roasts, cook the pasta. I like cavatappi, large elbows, or shells because they hold sauce well. Be sure to salt the boiling water generously. Drain the pasta when it’s al dente and make the sauce in the same pot to save dishes.

close up of cavatappi shaped pasta

In the pot, melt five tablespoons of butter over medium heat, whisk in six tablespoons of flour until fragrant, then slowly whisk in five cups of milk to avoid lumps. Add garlic powder, smoked paprika, salt, and pepper. Bring the mixture just to a simmer, remove from heat, and stir in about 16 ounces of hand-grated cheese until fully melted.

mac 'n cheese in a black pot with roasted cauliflower on a baking sheet underneath

Return the pot to medium heat, add the drained pasta and two cups of the roasted cauliflower, and stir until everything is evenly coated and heated through. Serve as-is or transfer to a 9×13 baking dish, top with a crispy topping like panko, crushed crackers, or French-fried onions, and broil 3–5 minutes until golden—watch carefully so it doesn’t burn.

That optional bake step adds texture and elevates the presentation for guests, though it’s not necessary for busy weeknights.

Tips and Tricks:

grated cheese on a cutting board
  • Grate your own cheese. Pre-shredded cheese contains anti-caking agents that prevent it from melting smoothly.
  • Use a mix of cheeses for depth—sharp cheddar and smoked mozzarella work well. Avoid very aged, hard cheeses that don’t melt as easily.
  • For extra heat and flavor, add a pinch of cayenne to the sauce after adding the milk and before the cheese.

Looking for other easy pasta dinners your family will love? Try simple baked pastas, one-pot Alfredo, or pasta with marinated artichokes for variety.

📖 Recipe

bowl of roasted cauliflower macaroni and cheese

roasted cauliflower mac ‘n cheese

Marni Katz

A lighter take on classic mac ‘n cheese with roasted cauliflower — even picky eaters usually love it.
5 from 1 vote
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Prep Time 25 mins
Cook Time 15 mins
Total Time 40 mins
Course Dinner
Cuisine American
Servings 8 servings
Calories 557 kcal

Ingredients

  • one head of cauliflower
  • 1 tablespoon of olive oil
  • 12 oz pasta (about ½ cup removed from a 1 lb. box)
  • 5 tablespoons butter
  • 6 tablespoons flour
  • 1 teaspoon garlic powder
  • 1 teaspoon smoked paprika
  • salt and pepper to taste
  • 5 cups milk
  • 16 oz hand grated cheese (try 8 oz sharp cheddar + 8 oz smoked mozzarella)

Instructions

  • Preheat oven and roast cauliflower: cut into small florets, toss with olive oil, salt, and pepper, and spread on a parchment-lined sheet pan. Roast at 425°F until lightly caramelized and tender, about 25–30 minutes.
  • While the cauliflower roasts, bring a pot of salted water to a boil and cook pasta according to package directions. Drain and set aside.
  • In the same pot, melt butter over medium heat. Whisk in flour and cook briefly until fragrant.
  • Slowly whisk in the milk, ensuring there are no lumps. Add garlic powder, smoked paprika, salt, and pepper. Cook, whisking occasionally, until the mixture comes just to a boil.
  • Remove from heat and stir in the grated cheese until smooth. Return to medium heat, add the drained pasta and about 2 cups of roasted cauliflower, and stir until evenly coated and warmed through.
  • Optional: transfer to a 9×13 baking dish, top with a crunchy topping (panko, crushed crackers, or French-fried onions), and broil 3–5 minutes until golden—watch closely.
  • Serve and enjoy.

Notes

For a fancy finish, add a crunchy topping and bake briefly before serving. Options include French-fried onions, crushed crackers, or panko breadcrumbs.

Grate your own cheese for the best melting and texture—pre-shredded cheese contains stabilizers that affect melt.

Nutrition

Calories: 557 kcal
Carbohydrates: 48 g
Protein: 27 g
Fat: 29 g

Tried this recipe?Let me know what you think!

Missing an ingredient? Many grocery services can deliver items quickly if you need them for tonight’s dinner.

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