Name: Cacio e Pepe Cauliflower Gratin
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: Italian
Ingredients: 1 large head cauliflower, cut into florets; 1 tablespoon olive oil; 1 teaspoon salt; 1/2 teaspoon freshly ground black pepper, plus more to taste; 2 tablespoons unsalted butter; 2 tablespoons all-purpose flour; 1 1/2 cups whole milk; 1 cup freshly grated Manchego cheese; 1/2 cup freshly grated Parmesan cheese; 1/4 teaspoon garlic powder; 1/4 teaspoon crushed red pepper flakes (optional); 2 tablespoons chopped fresh parsley (for garnish)

I turn a classic Italian flavor combination into a rich and comforting vegetable side with this Cacio e Pepe Cauliflower Gratin. I roast tender cauliflower until golden, then coat it in a creamy, peppery cheese sauce made with nutty Manchego and Parmesan before baking it to bubbly perfection. It’s one of my favorite low-carb, vegetarian dishes when I want something cozy yet elegant.

Why You’ll Love This Recipe

I love how this recipe transforms simple cauliflower into something incredibly indulgent. The roasting step brings out a subtle sweetness and adds a slightly crisp edge, while the creamy cheese sauce delivers bold, peppery flavor inspired by traditional cacio e pepe.

I also appreciate how easy it is to prepare. I use pantry staples and a handful of quality cheeses to create a dish that feels special enough for gatherings but simple enough for a weeknight dinner. It pairs beautifully with roasted meats, grilled proteins, or I even enjoy it as a satisfying meatless main.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

1 large head cauliflower, cut into florets

1 tablespoon olive oil

1 teaspoon salt

1/2 teaspoon freshly ground black pepper, plus more to taste

2 tablespoons unsalted butter

2 tablespoons all-purpose flour

1 1/2 cups whole milk

1 cup freshly grated Manchego cheese

1/2 cup freshly grated Parmesan cheese

1/4 teaspoon garlic powder

1/4 teaspoon crushed red pepper flakes (optional)

2 tablespoons chopped fresh parsley (for garnish)

Directions

I start by preheating the oven to 400°F (200°C) and lightly greasing a baking dish.

I toss the cauliflower florets with olive oil, salt, and black pepper, then spread them out in a single layer on a baking sheet. I roast them for 20 to 25 minutes, until they’re tender and lightly golden, then set them aside.

While the cauliflower roasts, I melt the butter in a saucepan over medium heat. I whisk in the flour and cook it for 1 to 2 minutes until it turns lightly golden. Gradually, I whisk in the milk, stirring constantly to keep the sauce smooth. I let it cook for about 4 to 5 minutes, until thickened.

Once thick, I stir in the Manchego, Parmesan, garlic powder, and extra black pepper. I mix until the sauce is smooth and creamy.

I place the roasted cauliflower into the prepared baking dish and pour the cheese sauce evenly over the top. I like to sprinkle a little extra grated cheese and black pepper for added flavor.

I bake it for 15 to 20 minutes, until the top is bubbly and lightly browned. Before serving, I garnish it with freshly chopped parsley.

Servings and Timing

This recipe makes 6 servings.

Prep Time: 15 minutes

Cooking Time: 40 minutes

Total Time: 55 minutes

Each serving contains approximately 295 kcal.

Variations

I sometimes swap Manchego for sharp white cheddar or Gruyère when I want a slightly different flavor profile. If I prefer a stronger, more traditional cacio e pepe taste, I increase the black pepper and add a bit of Pecorino Romano.

For a crisp topping, I sprinkle toasted breadcrumbs mixed with olive oil over the top before baking. When I want to keep it strictly low-carb, I skip the flour and thicken the sauce with a small amount of cream cheese instead.

If I want extra depth, I add sautéed shallots or a pinch of nutmeg to the sauce.

Storage/Reheating

I store leftovers in an airtight container in the refrigerator for up to 3 days. When reheating, I prefer using the oven at 350°F until warmed through to maintain the creamy texture. If I use the microwave, I heat it in short intervals and stir gently to prevent the sauce from separating.

If the gratin thickens too much in the fridge, I add a splash of milk before reheating to bring back its creamy consistency.

FAQs

Can I make this dish ahead of time?

Yes, I often assemble the entire dish a day in advance and store it covered in the refrigerator. When I’m ready to serve, I bake it until hot and bubbly, adding a few extra minutes if needed.

Can I use frozen cauliflower?

I can use frozen cauliflower, but I make sure to thaw and drain it thoroughly to avoid excess moisture, which can make the gratin watery.

How do I make it gluten-free?

I replace the all-purpose flour with a gluten-free flour blend or cornstarch. I whisk it thoroughly to keep the sauce smooth and thick.

What main dishes pair well with this gratin?

I like serving it alongside roasted chicken, grilled steak, or baked salmon. It also works beautifully as part of a vegetarian spread with a fresh green salad.

Can I freeze this cauliflower gratin?

I can freeze it, but I keep in mind that the texture of the sauce may slightly change after thawing. I reheat it gently in the oven and stir carefully to help restore its creaminess.

Conclusion

I find this Cacio e Pepe Cauliflower Gratin to be the perfect balance of comfort and sophistication. The roasted cauliflower, creamy cheese sauce, and bold peppery kick come together in a dish that feels both hearty and refined. Whenever I need a crowd-pleasing side or a satisfying vegetarian option, I turn to this recipe because it never disappoints.

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