Cauliflower Au Gratin

Ingredients

• 1 headcauliflower
• 360 ml (1½ cups)light cream
• 42 g (3 tbsp)butter
• 16 g (2 tbsp)plain flour
• 100 g (1 cup)Gruyère cheese, grated
• 100 g (1 cup)white Cheddar cheese, grated
• 2 clovesgarlic, minced
• 2 sprigsthyme, leaves removed
• ½ tspground nutmeg
• 1 tspblack pepper
• to tastesalt
• 60 g (1 cup)panko breadcrumbs
• 28 g (2 tbsp)butter
• 1 tspblack pepper
• to tastesalt

Instructions

1. 1

   Preheat the oven

   Heat the oven to 175°C (350°F).

2. 2

   Blanch the cauliflower

   Half-fill a large pot with water and bring it to the boil over medium heat. Cut the cauliflower into large florets, boil them for 5 minutes, then drain and return them to the pot.

3. 3

   Make the sauce

   In a separate pot, melt 3 tbsp butter over low-medium heat. Stir in the flour until smooth, then whisk in the light cream, garlic, thyme, nutmeg, 1 tsp black pepper and salt to taste.

4. 4

   Add the cheese

   Take the pot off the heat and whisk in half of the Gruyère and half of the Cheddar.

5. 5

   Assemble the gratin

   Pour the cream mixture over the cauliflower and gently combine with a spoon. Transfer to a small greased baking dish, spread it evenly and scatter the remaining Gruyère and Cheddar over the top.

6. 6

   Toast the breadcrumbs

   Melt the remaining 2 tbsp butter in a small saucepan over low-medium heat. Add the panko, 1 tsp black pepper and salt to taste; stir continuously until the crumbs are light golden brown. Remove from the heat and let them cool before sprinkling over the cauliflower.

7. 7

   Bake and serve

   Bake for 25 minutes, or until the breadcrumbs are golden and the cauliflower is cooked through. If the topping needs more colour, briefly use the oven's grill to toast it to your liking. Remove from the oven, cool for about 15 minutes, garnish with a little thyme and serve.

What is cauliflower au gratin?

Au gratin describes a baked dish finished with a browned topping, often cheese or breadcrumbs. This American-style side takes the creamy, oven-baked approach and uses cauliflower in place of a starchy base.

The combination of Gruyère and white Cheddar gives the sauce a savoury, rich flavour, while panko adds a crisp finish. Briefly boiling the florets first helps them become tender during baking.

Nutrition and macros by portion

The nutrition label shows one serving as written: 310 calories, 12g protein, 12g carbs, 25g fat.

The cauliflower provides most of the carbohydrates, while the cream, butter and cheeses account for much of the fat; the cheese also supplies most of the protein. Balance a serving with a lean main and a generous portion of green vegetables.

Building a smooth cheese sauce

Roux: Stir the flour into the melted butter until smooth before adding the cream. This helps the sauce thicken evenly rather than leaving dry flour pockets.

Cheese: Take the pot off the heat before whisking in half the cheese. The rest melts over the top in the oven, giving the dish a cheesy surface as well as a creamy interior.

Getting the cauliflower texture right

Florets: Cut them into large, similar-sized pieces so they cook at roughly the same rate. The 5-minute boil starts the cooking without leaving them too soft before they go into the oven.

Draining: Drain the florets well before adding the sauce. Excess water can thin the cream mixture and make the finished dish watery.

Making the crunchy topping

Panko: These coarse breadcrumbs create a crisp contrast to the soft cauliflower and creamy sauce. Stir them continuously in the butter until lightly golden, as they can colour quickly in the saucepan.

Cooling: Let the breadcrumb mixture cool before scattering it over the gratin. This keeps it distinct on top rather than letting it melt into the cheese layer.

Checking the bake

Doneness: After 25 minutes, the topping should be golden and the cauliflower cooked through. If the crumbs need more colour, use the grill briefly and watch closely.

Resting: Leave the dish to cool for about 15 minutes before serving. This gives the sauce a little time to settle, making portions easier to lift.

What to serve alongside it

Roast dinner: Serve the gratin with roast chicken, turkey or another Sunday roast, alongside a green vegetable or salad for freshness.

Vegetarian plate: Pair it with roasted vegetables or a crisp leaf salad. Its creamy sauce and crisp topping make it substantial enough to take a prominent place among the sides.

Recipe notes & tips

• Cut the cauliflower into large florets of similar size for more even cooking.
• Drain the cauliflower thoroughly so it does not water down the sauce.
• Whisk the flour into the butter until smooth before adding the cream.
• Keep stirring the panko as it browns, since it can toast quickly.
• Use the grill only briefly at the end, and keep an eye on the topping.
• Allow the gratin to rest for about 15 minutes before serving.

Variations

• Add mustard: Whisk a little mustard into the cream mixture for a sharper savoury note.
• Change the cheese: Replace some of the Cheddar with another good melting cheese.
• Add herbs: Use chopped parsley or chives as a fresh finish alongside the thyme.
• Make it gluten-free: Use gluten-free flour and breadcrumbs in place of the standard versions.
• Add a vegetable: Mix in cooked leeks for another mild, savoury layer.

Common mistakes to avoid

• Wet cauliflower: Drain the florets thoroughly before mixing in the sauce.
• Lumpy sauce: Stir the flour into the butter until smooth before whisking in the cream.
• Overcooked florets: Keep the initial boil to 5 minutes so the cauliflower holds its shape.
• Burnt breadcrumbs: Stir continuously while toasting and remove them once light golden brown.
• Pale topping: Briefly use the grill after baking, watching closely so the crumbs do not burn.
• Runny portions: Let the dish rest for about 15 minutes before serving.

How to store

Store cooled leftovers in a covered container in the fridge for up to 3 days. Reheat in an oven at 180°C until hot throughout; the breadcrumb topping may be less crisp after storage.

Frequently asked questions