Sunday Roasted Cauliflower Gratin

Name: Sunday Roasted Cauliflower Gratin
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Yield: 6 servings
Ingredients: 1 large head of cauliflower, cut into florets; 2 tablespoons olive oil; Salt and pepper to taste; 1 cup heavy cream; 1 cup Gruyère cheese, grated; 1/2 cup Parmesan cheese, grated; 2 cloves garlic, minced; 1 teaspoon Dijon mustard; 1/4 teaspoon nutmeg; 1/2 cup breadcrumbs

Highlighted under: Oven Kitchen

I absolutely love making this Sunday Roasted Cauliflower Gratin as a comforting dish for family gatherings. The golden crust that forms on top is irresistible, and the creamy cheese sauce enveloping the tender cauliflower makes it a delightful indulgence. I enjoy how this recipe transforms a humble vegetable into a gourmet experience that impresses everyone at the table. It's the perfect blend of flavors and textures, and I can guarantee it will become a staple in your weekend meal rotation.

Created by

Maribel Hawthorne

Last updated on 2026-01-11T20:13:35.291Z

When I first tried this recipe, I was amazed by how well the roasted cauliflower pairs with the creamy cheese sauce. I experimented with different cheeses and discovered that a blend of Gruyère and Parmesan really elevates the dish. The roasting brings out a sweet, nutty flavor in the cauliflower that works wonders alongside the rich sauce.

One crucial tip I learned is to roast the cauliflower until it’s nicely browned before mixing it into the cheese sauce. This step enhances the flavor tremendously. It’s a simple technique that turns this dish into a showstopper for any Sunday dinner.

Why You'll Love This Recipe
Creamy cheese sauce with a crispy, golden topping
Nutty, sweet flavor of roasted cauliflower
Great for gatherings or as a cozy family meal

Essential Techniques for Perfecting Your Gratin

Roasting the cauliflower is a crucial step in this recipe. The high temperature of 425°F (220°C) not only enhances the natural sweetness but also contributes to a lovely caramelization on the florets. For an even more pronounced flavor, consider tossing the cauliflower with a pinch of smoked paprika or crushed red pepper flakes before roasting. This additional layer of spice can make a delightful difference in the final dish, adding depth and complexity without overpowering the polite flavors of the cheese sauce.

When preparing the cheese sauce, take care not to let it boil. A gentle simmer allows the cheeses to melt slowly, creating a creamy, velvety consistency. If you notice the sauce getting too thick, a splash of additional cream can help maintain that desirable smoothness. This attention to texture ensures the cheese sauce coats the cauliflower evenly, enhancing every bite without feeling greasy or clumpy.

Ingredient Insights and Substitutions

Using Gruyère cheese in this gratin is vital as it provides a nutty flavor that perfectly complements the roasted cauliflower. If Gruyère isn't available, Emmental or a good-quality Swiss cheese can be perfect substitutes, both offering similar melting properties and taste. For a sharper flavor, you might also try adding a bit of aged cheddar or gouda, but be cautious not to overpower the dish's balance.

The breadcrumbs on top create that irresistible crispy topping. If you're looking for a gluten-free option, almond flour mixed with nutritional yeast can mimic the crunch while keeping the dish gluten free. Additionally, adding herbs, like fresh thyme or parsley, to the breadcrumb mixture can elevate the presentation and flavor, making it more aromatic and inviting.

Ingredients

Roasted Cauliflower Gratin Ingredients

1 large head of cauliflower, cut into florets
2 tablespoons olive oil
Salt and pepper to taste
1 cup heavy cream
1 cup Gruyère cheese, grated
1/2 cup Parmesan cheese, grated
2 cloves garlic, minced
1 teaspoon Dijon mustard
1/4 teaspoon nutmeg
1/2 cup breadcrumbs

Make sure to gather all your ingredients before starting to ensure a smooth cooking process.

Instructions

Roast the Cauliflower

Preheat your oven to 425°F (220°C). Toss the cauliflower florets with olive oil, salt, and pepper on a baking sheet. Roast for 25 minutes or until golden brown, flipping halfway through.

Prepare the Cheese Sauce

In a saucepan over medium heat, combine heavy cream, Gruyère cheese, Parmesan cheese, garlic, Dijon mustard, and nutmeg. Stir constantly until the cheese is melted and the sauce is smooth.

Combine and Bake

In a large baking dish, combine the roasted cauliflower with the cheese sauce. Mix well until the cauliflower is coated. Sprinkle breadcrumbs on top and bake for an additional 15 minutes, until golden and bubbly.

Allow the gratin to cool for a few minutes before serving to let the flavors meld together.

Pro Tips

For extra flavor, consider adding cooked bacon or sautéed onions to the cheese sauce. This dish can also be made ahead and reheated before serving.

Storing and Reheating Tips

If you have leftovers, store the gratin in an airtight container in the refrigerator for up to three days. To reheat, place the gratin in a preheated oven at 350°F (175°C) for about 15-20 minutes. This will help revive the crispy top while ensuring the inside is warmed through. If the top has lost its crunch, you can broil it for a minute or two at the end to restore that golden finish.

For longer-term storage, cauliflower gratin can be frozen. Allow it to cool completely before transferring it to a freezer-safe dish, covering it tightly. It can be frozen for up to three months. When ready to enjoy, thaw it overnight in the refrigerator and follow the reheating instructions to bring it back to life. It’s a great make-ahead option for busy weeks!

Serving Suggestions

This Roasted Cauliflower Gratin pairs wonderfully with a simple green salad and crusty bread. Consider a light vinaigrette to balance the richness of the dish. You might also serve it alongside grilled meats or a hearty vegetable stew, making it a versatile addition to any meal. I often enjoy it as a main dish, garnished with fresh herbs for a pop of color and aroma.

To elevate the experience further, try a sprinkle of freshly grated nutmeg or a drizzle of truffle oil right before serving; both will enhance the earthy flavors of the cauliflower and the nuttiness of the cheeses. Don’t hesitate to personalize the flavors with your preferred toppings or side dishes that complement this comforting gratin!

Questions About Recipes

→ Can I use frozen cauliflower?

Yes, but make sure to thaw and drain any excess water before roasting.

→ What can I substitute for heavy cream?

You can use half and half or a plant-based cream alternative for a lighter version.

→ How long can leftovers be stored?

Leftovers can be stored in the refrigerator for up to 3 days in an airtight container.

→ Can this dish be made gluten-free?

Yes, simply replace the breadcrumbs with gluten-free breadcrumbs or omit them entirely.