Cauliflower Au Gratin is a classic French dish that brings out the best in this versatile vegetable. This recipe combines tender cauliflower florets with a rich, cheesy béchamel sauce, all baked to perfection with a golden breadcrumb topping. It's a comforting and elegant side dish that's perfect for special occasions or a cozy family dinner. With its creamy texture and savory flavor, Cauliflower Au Gratin is sure to impress guests and become a favorite at the table.
Why I Love This Recipe
I love how this dish transforms simple cauliflower into a luxurious side that's both comforting and elegant. The creamy béchamel sauce, infused with Gruyère and Parmesan, adds depth and richness, while the golden breadcrumb topping provides a satisfying crunch. It's a versatile recipe that pairs well with various main courses and is always a hit at gatherings.
Ingredients
(Here's a tip: Check out the full list of ingredients and measurements in the recipe card below.)
- 1 large head of cauliflower, cut into florets
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cups whole milk
- 1 cup grated Gruyère cheese
- ½ cup grated Parmesan cheese
- ¼ cup breadcrumbs
- 2 cloves garlic, minced
- ½ teaspoon salt
- ¼ teaspoon black pepper
- ¼ teaspoon ground nutmeg
- 1 tablespoon chopped fresh parsley (optional)
Directions
- Preheat the oven to 375°F (190°C). Grease a 2-quart baking dish with butter or cooking spray and set aside.
- Bring a large pot of salted water to a boil. Add the cauliflower florets and cook for 5-7 minutes until just tender. Drain well and transfer to the prepared baking dish.
- In a medium saucepan over medium heat, melt the butter. Add the minced garlic and cook for 1 minute until fragrant. Stir in the flour to form a roux, cooking for about 2 minutes until golden and bubbling.
- Gradually whisk in the milk, ensuring there are no lumps. Continue to cook, whisking constantly, until the sauce thickens, about 5 minutes. Remove from heat and stir in the Gruyère cheese, ¼ cup of the Parmesan cheese, salt, pepper, and nutmeg until the cheese is melted and the sauce is smooth.
- Pour the cheese sauce evenly over the cauliflower florets in the baking dish. Sprinkle the breadcrumbs and the remaining ¼ cup of Parmesan cheese over the top.
- Bake in the preheated oven for 25-30 minutes, or until the top is golden brown and the sauce is bubbling around the edges. Garnish with chopped fresh parsley, if desired, before serving.
Servings and Timing
- Servings: 6
- Preparation Time: 20 minutes
- Cooking Time: 30 minutes
- Total Time: 50 minutes
Variations
- Cheese Options: While Gruyère and Parmesan are traditional, I sometimes use sharp cheddar or Fontina for a different flavor profile.
- Herbs: Incorporating fresh thyme or rosemary into the béchamel sauce adds an aromatic touch.
- Spice: A pinch of cayenne pepper or mustard powder can provide a subtle kick.
Storage and Reheating
- Storage: I store leftovers in an airtight container in the refrigerator for up to 3 days.
- Reheating: To reheat, I cover the dish with foil and bake at 350°F (175°C) until warmed through, about 15-20 minutes. Alternatively, individual portions can be microwaved for 2-3 minutes.
FAQs
What can I use instead of Gruyère cheese?
I often substitute Gruyère with sharp cheddar, Fontina, or Swiss cheese, depending on what I have on hand. Each offers a unique flavor that complements the dish well.
Can I make this dish ahead of time?
Yes, I prepare the dish up to the baking step, cover it, and refrigerate for up to 24 hours. When ready to serve, I bake it as directed, adding a few extra minutes to the cooking time if needed.
Is it possible to make this recipe gluten-free?
Absolutely. I use gluten-free all-purpose flour for the roux and gluten-free breadcrumbs for the topping to accommodate dietary restrictions.
Can I freeze Cauliflower Au Gratin?
While I prefer it fresh, I sometimes freeze the assembled, unbaked dish. I wrap it tightly and freeze for up to 2 months. When ready to bake, I thaw it in the refrigerator overnight and bake as directed.
How do I prevent the sauce from curdling?
To avoid curdling, I ensure the milk is at room temperature before adding it to the roux and whisk continuously to maintain a smooth consistency.
Conclusion
Cauliflower Au Gratin is a timeless and versatile dish that brings a touch of elegance to any meal. The combination of tender cauliflower, creamy béchamel sauce, and a golden, cheesy topping creates a deliciously satisfying side dish. Whether serving it at a holiday gathering or a simple weeknight dinner, this recipe is sure to become a beloved part of the culinary repertoire. Enjoy the comforting flavors and delightful textures of this classic French dish!

Cauliflower Au Gratin Recipe
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Yield: 6 servings
- Category: Side Dish
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Description
Cauliflower Au Gratin is a creamy, cheesy French-inspired side dish featuring tender cauliflower baked in a rich béchamel sauce with Gruyère and Parmesan, topped with golden breadcrumbs.
Ingredients
- 1 large head of cauliflower, cut into florets
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cups whole milk
- 1 cup grated Gruyère cheese
- ½ cup grated Parmesan cheese
- ¼ cup breadcrumbs
- 2 cloves garlic, minced
- ½ teaspoon salt
- ¼ teaspoon black pepper
- ¼ teaspoon ground nutmeg
- 1 tablespoon chopped fresh parsley (optional)
Instructions
- Preheat the oven to 375°F (190°C). Grease a 2-quart baking dish with butter or cooking spray and set aside.
- Bring a large pot of salted water to a boil. Add the cauliflower florets and cook for 5-7 minutes until just tender. Drain well and transfer to the prepared baking dish.
- In a medium saucepan over medium heat, melt the butter. Add the minced garlic and cook for 1 minute until fragrant. Stir in the flour to form a roux, cooking for about 2 minutes until golden and bubbling.
- Gradually whisk in the milk, ensuring there are no lumps. Continue to cook, whisking constantly, until the sauce thickens, about 5 minutes. Remove from heat and stir in the Gruyère cheese, ¼ cup of the Parmesan cheese, salt, pepper, and nutmeg until the cheese is melted and the sauce is smooth.
- Pour the cheese sauce evenly over the cauliflower florets in the baking dish. Sprinkle the breadcrumbs and the remaining ¼ cup of Parmesan cheese over the top.
- Bake in the preheated oven for 25-30 minutes, or until the top is golden brown and the sauce is bubbling around the edges. Garnish with chopped fresh parsley, if desired, before serving.
Notes
- Substitute Gruyère with sharp cheddar or Fontina for a different flavor.
- Use fresh herbs like thyme or rosemary for an aromatic twist.
- Use gluten-free flour and breadcrumbs to make the dish gluten-free.
Nutrition
- Serving Size: ⅙ of dish
- Calories: 260
- Sugar: 4g
- Sodium: 400mg
- Fat: 18g
- Saturated Fat: 11g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 13g
- Fiber: 3g
- Protein: 10g
- Cholesterol: 45mg
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