Gratin de Chou-fleur (French Cauliflower Gratin)
Why this recipe works
- Creamy centre: A classic béchamel coats the cauliflower evenly, giving the gratin a soft, spoonable texture without relying on cream.
- Balanced savoury flavour: Nutmeg, Dijon mustard and Gruyère add depth to the mild cauliflower and keep the sauce from tasting flat.
- Classic gratin finish: Baking until the sauce bubbles and the cheese browns creates the recognisable golden top that defines a good gratin.
Get the most out of this recipe
Authenticity notes
- French home-style gratin: This style of vegetable gratin is built around a simple white sauce, cheese and a hot oven rather than heavy seasoning.
- Gruyère gives the classic finish: Gruyère melts smoothly into the sauce and browns well on top, giving the gratin its nutty, savoury character.
Timing notes
- Most hands-on time is before baking: The key work is blanching the cauliflower and whisking the béchamel; the oven then finishes the gratin.
- Rest before serving: A short rest after baking lets the sauce settle slightly, making the gratin creamier and easier to spoon.
- Serve hot: The texture is best when the sauce is still bubbling and the cheese topping remains crisp at the edges.
Texture tips
- Drain the cauliflower well: Letting the florets steam-dry briefly after boiling helps prevent excess water from thinning the béchamel.
- Whisk the milk in gradually: Adding the milk slowly to the butter-and-flour base helps the sauce stay smooth rather than lumpy.
- Bake until deeply golden: The gratin is ready when the centre is bubbling and the Gruyère topping has browned into a crisp, savoury crust.
Make-ahead tips
- Assemble ahead: The gratin can be assembled in advance, covered and chilled, then baked when needed.
- Reheat gently: Reheat covered in a 180°C (355°F) oven until piping hot, adding a splash of milk if the sauce looks too tight.
- Best on the day it is baked: Leftovers keep well, but the freshly baked topping has the best contrast between crisp cheese and creamy sauce.
Equipment you'll need
Ingredients
Instructions
- Heat the oven to 200°C (390°F). Bring a large pot of well-salted water to the boil.
- Cut the cauliflower into florets and boil for 6 to 8 minutes until just tender but not soft. Drain well and leave in the colander for a couple of minutes so steam can escape.
- Meanwhile, make the béchamel: melt the butter in a saucepan over medium heat, then stir in the flour and cook for 1 minute until it smells biscuity. Gradually whisk in the milk until smooth, then cook, whisking often, for 5 to 7 minutes until thick enough to coat the back of a spoon.
- Take the pan off the heat and whisk in the Dijon mustard, nutmeg, black pepper and 1 tsp of the salt. Stir in about two-thirds of the Gruyère cheese until melted and smooth.
- Arrange the cauliflower in a baking dish and pour over the sauce, turning gently to coat. Sprinkle over the remaining Gruyère cheese.
- Bake for 20 to 25 minutes until bubbling and deeply golden on top. Rest for 5 minutes before serving so the sauce settles slightly.
Recipe notes
Serving suggestions
This recipe pairs well with:
Tips
- Drain the cauliflower thoroughly so the gratin stays creamy rather than watery.
- If the top is golden before the centre is bubbling, lower the oven to 180°C (355°F) and continue baking until hot throughout.
Substitutions
- Replace Gruyère cheese with aged cows milk cheese for a slightly sharper, saltier finish.
- Replace Dijon mustard with whole-grain mustard for a milder heat and a little texture.
Storage
- Refrigerate up to 3 days
- Cool completely, then cover and refrigerate. Reheat in a 180°C (355°F) oven for 15 to 20 minutes until piping hot; add a splash of whole milk if the sauce looks tight.
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Recipe overview
- Servings: 4 servings
- Total time: 1h 15min (30min active)
- Difficulty: Medium
- Cuisine: French
-
Allergens:
Gluten Milk Wheat
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