Sunday Roasted Cauliflower Gratin

Name: Sunday Roasted Cauliflower Gratin
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 6 servings
Ingredients: 1 large head of cauliflower, cut into florets; 3 tablespoons olive oil; Salt and pepper to taste; 2 cups grated cheese (Gruyère or cheddar); 1 cup heavy cream; 1 teaspoon Dijon mustard; 1 clove garlic, minced; 1 cup breadcrumbs; 2 tablespoons fresh parsley, chopped (for garnish)

Highlighted under: Simple Baking Collection

I absolutely love preparing Sunday Roasted Cauliflower Gratin on cozy weekends. This dish is a comforting blend of tender roasted cauliflower smothered in a creamy cheese sauce, topped with a crispy breadcrumb layer. It’s the perfect side dish for family gatherings or a special meal at home. The subtle garlic and mustard notes elevate the flavors, making each bite a delight. Plus, it’s surprisingly simple to make while delivering a gourmet experience that feels special. I can’t wait to share this delightful recipe with you!

Created by

Serena Whitaker

Last updated on 2026-01-13T02:27:34.927Z

When I first tried making roasted cauliflower gratin, I was amazed by how well the flavors blended together. The key was to roast the cauliflower until it's golden brown before adding the creamy sauce. This technique infuses the dish with a depth of flavor that is simply irresistible. Another tip is to sprinkle a little extra cheese on top; it creates a deliciously gooey crust!

Over the years, I’ve perfected my method, incorporating a hint of Dijon mustard into the cheese sauce to give it a subtle tang. The crispy breadcrumbs on top not only add texture but also elevate the presentation, making it an ideal dish for entertaining. Each time I serve it, I’m met with compliments that leave me beaming!

Why You'll Love This Recipe
Creamy cheese sauce that envelops the tender cauliflower
Golden, crispy breadcrumb topping for the perfect crunch
Easy to make yet impressive enough for guests

Understanding the Key Ingredients

The choice of cheese is crucial in this recipe. Gruyère brings a nutty and slightly sweet flavor, while cheddar offers a sharper taste. Depending on your preference or what’s available, you can mix different cheeses for added depth. Just ensure to use good quality cheese since it directly influences the gratin's creaminess and flavor profile.

Cauliflower is not only the star of the dish but also adds a wonderful texture. When roasted, it develops sweet, caramelized edges that contrast beautifully with the creamy sauce. For an even more complex flavor, consider adding spices like smoked paprika or a pinch of nutmeg to the cheese sauce to elevate it further.

Perfecting the Roasting Technique

Roasting the cauliflower at 400°F (200°C) is essential for achieving that perfect golden color and tenderness. Make sure to arrange the florets in a single layer on the baking sheet for even roasting. If overcrowded, they will steam instead of roast, resulting in a less desirable texture. Stirring them halfway through ensures all sides get that beautifully roasted finish.

After roasting, a quick shake of salt as they come out of the oven enhances their flavor right away. Allowing them to cool slightly before adding them to the cheese sauce will help maintain their structure, preventing them from becoming too mushy during baking.

Serving and Storing Leftovers

This Sunday Roasted Cauliflower Gratin is versatile and can complement various main dishes, such as roast chicken or grilled fish. For an added twist, serve it alongside a fresh salad to contrast the rich flavors. To elevate the presentation, consider a sprinkle of smoked sea salt or a few red pepper flakes on top before serving for an additional pop of flavor.

If you have leftovers, store them in an airtight container in the refrigerator for up to three days. To reheat, place in a preheated oven at 350°F (175°C) for about 15-20 minutes, or until heated through and the top is crispy once again. You can also freeze it, but keep in mind that the texture may change slightly upon thawing.

Ingredients

Roasted Cauliflower Gratin Ingredients

1 large head of cauliflower, cut into florets
3 tablespoons olive oil
Salt and pepper to taste
2 cups grated cheese (Gruyère or cheddar)
1 cup heavy cream
1 teaspoon Dijon mustard
1 clove garlic, minced
1 cup breadcrumbs
2 tablespoons fresh parsley, chopped (for garnish)

Instructions

Roast the Cauliflower

Preheat your oven to 400°F (200°C). Toss the cauliflower florets with olive oil, salt, and pepper, then spread them on a baking sheet. Roast for about 20 minutes, or until they are golden and tender.

Prepare the Cheese Sauce

In a saucepan over medium heat, combine the heavy cream, mustard, and minced garlic. Stir in the grated cheese until melted and smooth. Season with salt and pepper to taste.

Combine and Bake

In a baking dish, combine the roasted cauliflower with the cheese sauce. Top with breadcrumbs and an additional sprinkle of cheese if desired. Bake in the oven for another 10 minutes until the top is golden and bubbling.

Garnish and Serve

Once baked, let the gratin cool for a few minutes before garnishing with fresh parsley. Serve hot and enjoy!

Pro Tips

For added flavor, consider mixing in some sautéed onions or mushrooms with the cauliflower before roasting. You can also experiment with different types of cheese to customize the flavor to your liking.

Tips for Variations

For a healthier alternative, you can substitute half of the cheese with a low-fat cheese or Greek yogurt. This adjustment offers a lighter version without sacrificing too much of the creamy texture. Additionally, adding steamed broccoli or spinach with the cauliflower can introduce more nutrients and colors to the dish.

If you're looking for a gluten-free option, simply replace regular breadcrumbs with gluten-free breadcrumbs or crushed nuts. This not only meets dietary restrictions but also adds a delightful crunch and nutty flavor to the topping.

Troubleshooting Common Issues

If your cheese sauce seems too thin, consider adding an extra tablespoon of cheese or a teaspoon of cornstarch mixed with a bit of water to help thicken it. Remember to simmer it on low heat to prevent burning while stirring until it reaches the desired consistency.

Should you find your gratin lacks flavor, ensure to season well with salt and pepper at each step. Also, don't skip the Dijon mustard, as it enhances the cheese's richness and provides a subtle depth that pulls the entire dish together.

Questions About Recipes

→ Can I make this dish ahead of time?

Yes, you can prepare the cauliflower and cheese sauce a day in advance. Just assemble before baking.

→ What other vegetables can I use?

This recipe is great with broccoli or Brussels sprouts as alternatives to cauliflower.

→ Is it possible to make this dish gluten-free?

Absolutely! Substitute traditional breadcrumbs with gluten-free breadcrumbs or crushed gluten-free crackers.

→ How long can leftovers be stored?

Leftovers can be stored in the refrigerator for up to 3 days; just reheat in the oven for best results.