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If you’re looking for a way to make cauliflower extra special, this recipe is just what you need. My family absolutely loves this Cauliflower Au Gratin — it’s creamy, cheesy, and baked until golden with a crunchy breadcrumb topping. Honestly, it’s the kind of dish that disappears quickly at the dinner table!
What I love most is how simple it is to put together. A few everyday ingredients — cauliflower, milk, butter, cheese, and breadcrumbs — come together to create something that feels like real comfort food. It’s perfect as a cozy weeknight side dish, but it also shines on the holiday table.
Why You’ll Love This Recipe
- So comforting – Creamy, cheesy, and baked until golden… this is the kind of dish that warms you up from the first bite.
- Kid-approved – Even picky eaters won’t say no to cauliflower when it’s covered in a delicious sauce and melted cheese.
- Simple ingredients – Everything you need is probably already in your kitchen.
- Versatile – Works as a cozy side dish for family dinners or as a star on your holiday table.
- Crowd-pleaser – Don’t be surprised if the dish is empty before you know it!
Ingredient Notes
- Cauliflower – Fresh works best, but you can also use frozen florets (just cook a little less so they don’t get too soft).
- Milk – Whole milk makes the sauce extra creamy, but low-fat works too.
- Cheese – Mozzarella gives that melty texture, while Parmesan adds a sharp, nutty flavor.
- Breadcrumbs – Store-bought or homemade both work. Panko will give you an extra-crispy topping.
- Nutmeg – Just a pinch really lifts the sauce, but you can leave it out if you prefer.
How To Make Cauliflower Au Gratin
Prepare the cauliflower
- Bring a pot of salted water to a boil. Add the cauliflower florets and cook for about 8 minutes, until just tender. Drain well and set aside.
Preheat the oven
- Heat your oven to 200°C (390°F). Grease a 25 × 18 cm baking dish with butter and coat it lightly with breadcrumbs. (I added a pinch of chili flakes to the breadcrumbs for a little extra kick).
Make the sauce
- In a small saucepan, melt the butter over medium heat. Stir in the flour and cook for 1 minute, whisking constantly. Gradually add the milk, whisking until smooth and thickened. Season with nutmeg, salt, and black pepper. Remove from the heat and stir in the Parmesan and minced garlic.
Assemble the gratin
- Arrange the cauliflower evenly in the prepared baking dish. Pour the creamy sauce over the cauliflower and sprinkle with mozzarella.
Prepare the topping
- In a small bowl, combine breadcrumbs with melted butter, salt, and pepper. Scatter the mixture evenly over the cheese layer.
Bake
- Place the dish in the oven and bake for 20–25 minutes, until golden and bubbling. Let it rest for 5 minutes before serving.
Tips & Tricks
- Don’t overcook the cauliflower – Boil or steam just until tender. It will continue cooking in the oven, and you want it to hold its shape.
- Drain well – Make sure the cauliflower isn’t watery before adding the sauce, or the gratin can turn soggy.
- Whisk the sauce slowly – Add the milk a little at a time, whisking constantly, for a smooth and creamy texture.
- Cheese mix – Feel free to add Gruyère or Cheddar along with the mozzarella for extra flavor.
- Make ahead – You can assemble the gratin a few hours in advance, then bake right before serving.
- Crispier topping – Use panko breadcrumbs or mix in a little extra Parmesan with the topping for more crunch.
Serving Suggestions for Cauliflower Au Gratin
This gratin pairs beautifully with roasted chicken, grilled salmon, or even as part of a vegetarian spread alongside a crisp green salad. For special occasions, it makes a stunning side dish that feels both comforting and elegant.
Storage & Reheating
- Fridge – Store leftovers in an airtight container in the fridge for up to 3 days.
- Reheat – Warm in the oven at 180°C (350°F) until heated through, so the topping stays crispy. The microwave works too, but the breadcrumbs won’t be as crunchy.
- Freezer – This dish isn’t the best for freezing since the sauce can separate, but if you do freeze it, wrap it tightly and reheat in the oven straight from frozen.
Final Thoughts
This Cauliflower Au Gratin is one of those dishes that feels like a warm hug on a plate. Creamy, cheesy, and topped with a golden crunch, it’s simple enough for a weeknight dinner but special enough for guests or holiday meals.
Give it a try — I promise your family (and maybe even picky eaters!) will ask for seconds. It’s one of those recipes that turns everyday ingredients into something truly comforting and memorable.
More Cauliflower Recipes
Parmesan Roasted Cauliflower Bites
Cheesy Cauliflower Steaks with Bacon
Cauliflower Au Gratin
Ingredients
For the gratin:
- 800 g cauliflower (about 1 large head), cut into florets
- 2 tbsp breadcrumbs (for coating the baking dish)
- 70 g mozzarella grated
For the sauce:
- 2 tbsp butter
- 2 tbsp flour
- 3 garlic cloves finely minced
- 4 tbsp grated Parmesan
- 400 ml milk
- ¼ tsp nutmeg
- Salt to taste
- Black pepper to taste
- chili flakes to taste
For garnish:
- Fresh parsley chopped
Instructions
- Preheat the oven to 200°C (390°F). Grease a 25 × 18 cm baking dish and coat it with 2 tsp breadcrumbs. (I added a pinch of chili flakes to the breadcrumbs for a little extra kick).
- Cook the cauliflower: Boil or steam for 8 minutes until just tender. Drain well.
- Make the sauce: Melt butter in a small saucepan over medium heat. Stir in flour and cook 1 minute. Gradually whisk in milk until thickened. Season with nutmeg, salt, chili flakes and pepper. Remove from heat and stir in Parmesan and garlic.
- Assemble the gratin: Arrange cauliflower in the baking dish. Pour sauce over and sprinkle with mozzarella.
- Prepare the topping: Mix breadcrumbs with melted butter, salt, and pepper. Scatter evenly over the cheese.
- Bake: 20–25 minutes until golden and bubbling. Remove from the oven and sprinkle with freshly chopped parsley. Let rest 5 minutes before serving.
Notes
- Don’t overcook the cauliflower; it will finish cooking in the oven.
- Drain thoroughly to avoid a soggy gratin.
- Panko breadcrumbs or extra Parmesan can make the topping crunchier.
- Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in the oven for best results.
