Cauliflower and broccoli gratin

This Cauliflower and Broccoli Gratin features tender vegetables enveloped in a creamy béchamel sauce, topped with Parmesan for a cheesy finish. Ideal as a comforting side dish for family meals.

09 Feb 2026
Cook time 20 min
Prep time 10 min

Ingredients:

1/4 cup butter
2 tbsp all-purpose white wheat flour
2 cups milk (1% fat)
3/4 cup grated parmesan cheese
salt & pepper to taste
1 cauliflower
1.50 lb broccoli
Cauliflower and broccoli gratin

Cauliflower and broccoli gratin is a delightful and nutritious dish that combines these two vegetables in a creamy, cheesy sauce. Perfect for family dinners or a nutritious side dish, this gratin will become a household favorite. Follow this recipe to achieve a perfect blend of flavors and textures.

Instructions:

1. Preheat the Oven:
Preheat your oven to 375°F (190°C).
2. Prepare the Vegetables:
- Separate the cauliflower and broccoli into bite-sized florets.
- Bring a large pot of water to a boil over high heat. Add the cauliflower florets and cook for about 5 minutes, then add the broccoli florets and cook for an additional 3 minutes, until just tender.
- Drain the vegetables and set them aside.
3. Make the Béchamel Sauce:
- In a medium-sized saucepan, melt the butter over medium heat.
- Add the flour and whisk constantly for about 2 minutes to create a smooth roux, which should be lightly golden but not browned.
- Gradually pour in the milk while continuously whisking to prevent lumps. Continue to cook, whisking frequently, until the sauce thickens and becomes smooth, about 5-7 minutes.
- Remove the sauce from heat and stir in 1/2 cup (40g) of the grated Parmesan cheese, salt, and pepper to taste.
4. Assemble the Gratin:
- In a large mixing bowl, combine the blanched cauliflower and broccoli with the béchamel sauce. Toss gently until the vegetables are well-coated.
- Transfer the vegetable mixture to a baking dish and spread it out evenly.
5. Top and Bake:
- Sprinkle the remaining 1/4 cup (20g) of grated Parmesan cheese evenly over the top.
- Place the baking dish in the oven and bake for 25-30 minutes, or until the top is golden brown and the sauce is bubbling.
6. Serve:
- Remove the gratin from the oven and let it cool for a few minutes before serving.

Enjoy your cauliflower and broccoli gratin as a comforting main dish or as a flavorful side. It's a fantastic way to incorporate more vegetables into your diet while indulging in a creamy, cheesy treat. Serve hot and savor every bite!

Cauliflower and broccoli gratin FAQ:

How do I know when the gratin is done baking?

The gratin is done when the top is golden brown and the sauce is bubbling, which usually takes about 25-30 minutes at 375°F (190°C). You can also insert a knife into the center; if it comes out hot, the dish is ready.

Can I prepare the gratin in advance and reheat it later?

Yes, you can prepare the gratin ahead of time and store it in the refrigerator for up to 2 days. Reheat it in the oven at 350°F (175°C) until warmed through, about 20-25 minutes.

What pan size is best for this gratin?

A 9x13 inch baking dish works well for this recipe, providing enough space for the vegetables and sauce without overflowing.

What can I substitute for parmesan cheese in this recipe?

You can substitute parmesan cheese with other hard cheeses like pecorino romano or aged gouda, or use a dairy-free cheese alternative if needed.

How can I make this gratin healthier?

To make it healthier, you can reduce the amount of butter or use a light version of milk. You can also add more vegetables or opt for whole wheat flour in the béchamel sauce.

Tips:

- Pre-cook the vegetables: Blanch the cauliflower and broccoli in boiling water for a few minutes before baking. This will ensure they are tender and cook evenly in the gratin.

- Use whole milk for a richer sauce: While the recipe calls for 1% milk, using whole milk can make the sauce creamier and richer if desired.

- Season to taste: Don't forget to taste the sauce before adding it to the vegetables. Adjust the salt and pepper according to your preference to enhance the flavors.

- Add breadcrumbs for a crispy topping: Sprinkle some breadcrumbs mixed with a bit of melted butter on top before baking for a deliciously crispy finish.

Nutrition per serving

8 Servings
Calories 180kcal
Protein 9g
Carbohydrates 18g
Fiber 4.40g
Sugar 6g
Fat 9g

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