If you’ve ever craved a side dish that feels both indulgent and comforting, this Creamy Baked Cauliflower Gratin Recipe is exactly what you need. Imagine tender cauliflower cloaked in a luscious cheese sauce, bubbling under a golden, crispy breadcrumb crust—it’s the perfect blend of rich and fresh, simple yet impressive. This dish elevates humble cauliflower into a star-worthy gratin that everyone will ask for again and again, bringing warmth and flavor to your table in every bite.

Ingredients You’ll Need
These ingredients are straightforward but each one plays a key role in creating that unbeatable richness, velvety texture, and golden crust that makes this gratin irresistible.
- 3-pound head of cauliflower: The main star providing tender, bite-sized florets that soak up every bit of the creamy sauce.
- 3 tablespoons unsalted butter: Essential for a silky roux base to thicken your cheese sauce without overpowering the flavors.
- 3 tablespoons all-purpose flour: The thickening agent that transforms milk into a luxuriously creamy sauce.
- 2 cups milk: Adds smooth moisture and richness, melding with the cheese to create perfect sauce consistency.
- 3/4 cup grated Gruyère cheese: Offers a slightly nutty, melting quality that gives the gratin its signature flavor depth.
- 1/2 cup grated Parmesan cheese: Brings a savory, tangy note and helps form a delightful crust alongside the breadcrumbs.
- Fresh breadcrumbs for topping: Adds a crunchy, golden finish that contrasts beautifully with the creamy interior.
- Seasonings (thyme, nutmeg, salt, pepper): These subtle flavor enhancers round out the sauce, keeping it balanced and inviting.
How to Make Creamy Baked Cauliflower Gratin Recipe
Step 1: Prepare the Cauliflower
Start by preheating your oven to 375°F (190°C) and greasing a casserole dish around 8 x 11 x 2 inches—you want everything ready to go for assembling. Next, steam or boil the cauliflower florets in salted water for about 5-6 minutes until they’re tender but still have a bit of bite. This step ensures the cauliflower cooks evenly without becoming mushy once baked.
Step 2: Make the Roux and Cheese Sauce
In a medium saucepan, melt the unsalted butter over medium heat. Whisk in the all-purpose flour and continue stirring until the mixture becomes golden brown, which develops a beautiful, nutty base for the sauce. Gradually pour in the milk while whisking constantly to prevent lumps—keep cooking until the sauce thickens to a creamy, smooth texture that clings to the back of your spoon.
Step 3: Add Seasonings and Cheese
Now for the flavor bomb: stir in fresh thyme, a pinch of nutmeg, salt, and pepper to make the sauce fragrant and well-rounded. Finally, mix in your Gruyère and Parmesan cheeses until they melt completely, transforming the sauce into a rich, velvety blanket that will lovingly coat the cauliflower.
Step 4: Assemble the Gratin
Spread a layer of the cheese sauce at the bottom of your casserole dish to keep the cauliflower from sticking and to add a luxurious base. Arrange the cauliflower florets evenly on top, then pour the remaining sauce over them, making sure they’re fully covered for maximum creaminess.
Step 5: Top and Bake
Sprinkle fresh breadcrumbs generously over the surface, adding extra Gruyère if you want an even cheesier crust. Slide your dish into the oven and bake for about 30 minutes, or until the top is beautifully golden and crisp, bubbling with flavor beneath the crunchy crust.
How to Serve Creamy Baked Cauliflower Gratin Recipe
Garnishes
To add a pop of freshness, sprinkle chopped parsley or chives on top just before serving. A light drizzle of extra virgin olive oil or a few twists of freshly cracked black pepper can also elevate each rich bite with subtle complexity.
Side Dishes
This gratin pairs wonderfully with roasted meats like chicken or pork, contrasting the creamy texture with hearty proteins. For a lighter meal, serve alongside a crisp green salad dressed with lemon vinaigrette to balance the richness with bright acidity.
Creative Ways to Present
For family-style dinners, keep it in the casserole dish for a cozy, rustic vibe. If you want to impress, consider presenting individual portions in small ramekins or even hollowed-out mini cauliflower heads to add visual interest and let each guest enjoy their personal gratin.
Make Ahead and Storage
Storing Leftovers
Wrap any leftover Creamy Baked Cauliflower Gratin Recipe tightly with foil or transfer to an airtight container. It will keep well in the refrigerator for up to 3 days, maintaining its comforting texture and flavor.
Freezing
This gratin freezes beautifully, just be sure to cool it completely before placing in a freezer-safe container. Freeze for up to two months and thaw overnight in the fridge before reheating to preserve its creamy goodness.
Reheating
To reheat, place covered in a 350°F (175°C) oven until warmed through—this helps keep the sauce creamy and the breadcrumb topping crisp. Avoid microwaving which can make the texture watery or soggy.
FAQs
Can I use different cheeses for the gratin?
Absolutely! While Gruyère and Parmesan provide a classic flavor combo, you can substitute or mix in cheeses like cheddar, fontina, or mozzarella for a different but equally delicious twist.
Is it necessary to steam the cauliflower first?
Yes, lightly cooking the cauliflower before baking ensures it becomes tender but still holds its shape, preventing a mushy gratin and allowing the cheese sauce to penetrate perfectly.
Can this dish be made dairy-free?
It’s possible by using dairy-free butter, plant-based milk, and vegan cheese substitutes, although the classic flavor and texture will change somewhat. Adjust seasonings to enhance the alternative ingredients.
How do I get a crispy breadcrumb topping?
Use fresh, not stale breadcrumbs, and sprinkle them generously on top. Adding a little melted butter to the breadcrumbs before topping helps achieve that golden, crunchy texture during baking.
Can I add other vegetables to the gratin?
Definitely! Vegetables like broccoli, cauliflower’s natural partner, or even thinly sliced potatoes can be layered in to add variety, just adjust cooking times accordingly to ensure they’re tender.
Final Thoughts
I genuinely hope you give this Creamy Baked Cauliflower Gratin Recipe a try because it’s one of those dishes that brings comfort and elegance to any meal with ease. Once you experience its creamy sauce and crispy topping melded to tender cauliflower, it’s bound to become a beloved classic on your cooking roster. So grab your ingredients, warm up your oven, and enjoy every cheesy, golden bite!
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Creamy Baked Cauliflower Gratin Recipe
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 6 servings
- Category: Side Dish
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Description
This Creamy Baked Cauliflower Gratin features tender cauliflower florets enveloped in a rich, cheesy béchamel sauce made with Gruyère and Parmesan cheeses. Topped with crisp fresh breadcrumbs and extra Gruyère, this comforting dish is baked to golden perfection, perfect as a side or a vegetarian main.
Ingredients
Vegetables
- 3-pound head of cauliflower, cut into florets
Sauce
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cups milk
- 3/4 cup grated Gruyère cheese
- 1/2 cup grated Parmesan cheese
- 1/2 teaspoon dried thyme or 1 teaspoon fresh thyme leaves
- 1/8 teaspoon ground nutmeg
- Salt, to taste
- Black pepper, to taste
Topping
- Fresh breadcrumbs, enough to cover
- Additional Gruyère cheese for topping (about 1/4 cup)
Instructions
- Preheat the Oven: Preheat your oven to 375°F (190°C) and grease an 8 x 11 x 2-inch casserole dish to prevent sticking and ensure easy serving.
- Cook the Cauliflower: Steam or boil the cauliflower florets in salted water for about 5-6 minutes until they are firm yet tender. Drain thoroughly to remove excess moisture.
- Make the Cheese Sauce: In a medium saucepan, melt the unsalted butter over medium heat. Whisk in the all-purpose flour and cook until the mixture turns golden brown, forming a roux. Gradually pour in the milk, whisking continuously until the sauce thickens to a creamy consistency.
- Season and Add Cheese: Stir in dried or fresh thyme, ground nutmeg, salt, and black pepper. Then add the grated Gruyère and Parmesan cheeses, stirring until completely melted and smooth.
- Assemble the Gratin: Spread a layer of cheese sauce on the bottom of the prepared casserole dish. Arrange the cooked cauliflower florets over the sauce, cover them with the remaining cheese sauce, and top with fresh breadcrumbs and extra Gruyère cheese for a crispy, golden crust.
- Bake: Place the casserole dish in the preheated oven and bake for about 30 minutes, or until the top is beautifully golden brown and bubbling.
Notes
- To prevent a watery gratin, ensure cauliflower is well drained before assembling.
- If preferred, substitute milk with half-and-half for an even richer sauce.
- Fresh thyme can be replaced with dried thyme; adjust quantity accordingly to taste.
- Allow the gratin to cool slightly before serving to help it set and improve slicing.
- Breadcrumbs can be toasted beforehand for extra crunch.

