Easy Keto Cauliflower and Parmesan Gratin Recipe for a Delicious Low-Carb Meal

Welcome to a Cheesy Delight: Keto Cauliflower and Parmesan Gratin

Imagine a dish that not only aligns with your keto goals but also satisfies your deepest cravings for something warm, cheesy, and utterly comforting. That’s exactly what you get with this Keto Cauliflower and Parmesan Gratin. This recipe transforms the humble cauliflower into a luxurious side dish that’s perfect for any occasion. Whether you’re hosting a dinner party or simply looking for a delicious way to enjoy your vegetables, this gratin is sure to impress.

Rich in flavor and low in carbs, this gratin is a testament to the versatility of keto cooking. The golden-brown crust of melted Parmesan and mozzarella cheeses encases tender cauliflower florets, all bathed in a creamy garlic-infused sauce. It’s a dish that promises indulgence without the guilt, making it an ideal choice for those following a ketogenic diet. So let’s dive into the world of cheesy goodness and discover why this Keto Cauliflower and Parmesan Gratin should be on your must-cook list.

Keto Cauliflower and Parmesan Gratin

A Personal Touch to Keto Cooking

My journey with this Keto Cauliflower and Parmesan Gratin began as a quest to create a side dish that would not only complement any main course but also stand out on its own. The inspiration came from classic French cuisine, where gratins are a staple. However, the traditional recipes often include ingredients that are not keto-friendly. Determined to enjoy this dish without compromising my diet, I set out to create a low-carb version that would be just as satisfying.

The result is a gratin that’s rich in healthy fats and protein, thanks to the generous amounts of Parmesan and mozzarella cheeses. Cauliflower, the star of the show, is a keto favorite due to its low net carbs and ability to take on robust flavors. It’s also packed with fiber, vitamins, and antioxidants, making it a nutritious addition to any meal. The heavy cream adds a velvety texture, while garlic and onion powders, along with mustard and nutmeg, infuse the dish with warmth and depth.

Each bite of this gratin is a testament to the fact that keto eating doesn’t have to be restrictive. It’s about finding creative ways to enjoy the foods you love while maintaining a balance of macros. This dish is a perfect example of how a few simple tweaks to a classic recipe can yield a dish that’s both keto-approved and absolutely delicious.

Creamy Cauliflower Gratin Preparation

Mastering the Method

Creating the perfect Keto Cauliflower and Parmesan Gratin is all about technique. The key is to cook the cauliflower just enough to maintain its structure while allowing the cream sauce to penetrate and flavor each floret. Start by boiling the cauliflower until it’s tender but still firm. This will prevent it from turning mushy during the baking process.

When preparing the cream sauce, it’s crucial to let the mixture simmer gently. This allows the flavors to meld without the sauce becoming too thick. As you incorporate the Parmesan cheese, do so gradually and off the heat to ensure a smooth sauce without any clumping. The final touch is layering the cheeses on top, which will create that irresistible golden crust. Be sure to watch the gratin closely as it bakes, and if you desire an extra crunch, broil it briefly, keeping a vigilant eye to avoid burning.

Remember, the beauty of this dish lies in its simplicity and the quality of ingredients. Opt for fresh cauliflower and high-quality cheeses, as these will make all the difference in taste and texture. With a little care and attention to detail, you’ll have a gratin that’s not just a side dish, but a showstopper in its own right.

Golden Brown Cauliflower Gratin

Variations to Spice Things Up

Spicy Keto Cauliflower Gratin

For those who enjoy a bit of heat, try adding a teaspoon of red pepper flakes to the cream sauce. The subtle kick will complement the richness of the cheeses and add an exciting twist to the dish.

Bacon and Chive Keto Cauliflower Gratin

Bacon adds a smoky depth to any dish, and this gratin is no exception. Mix in crispy bacon bits before baking and garnish with fresh chives for a savory flavor profile that’s hard to resist.

Mediterranean Keto Cauliflower Gratin

Inspired by Mediterranean flavors, mix in some sun-dried tomatoes and olives, and top with feta cheese before baking. The tangy and briny notes will transport your taste buds to the sunny coasts of the Mediterranean.

Substitutions for Every Keto Kitchen

While this recipe is designed to be keto-friendly, there may be times when you need to make substitutions. Here are a few options that will keep your gratin low-carb and delicious:

Dairy-Free Keto Gratin: For those avoiding dairy, replace heavy cream with full-fat coconut milk and use a dairy-free cheese alternative. The result will be just as creamy and satisfying.

Nutritional Yeast for a Cheesy Flavor: If you’re cutting down on cheese, nutritional yeast can provide a cheesy flavor without the dairy. It’s also a great source of vitamins and minerals.

Herbaceous Twist: If fresh thyme isn’t available, feel free to use dried thyme or other herbs like rosemary or oregano for a different flavor profile.

Frequently Asked Questions

Can I make this gratin ahead of time? Yes, you can prepare the gratin up to the point of baking, cover, and refrigerate. Just add an extra 5-10 minutes to the cooking time when baking from chilled.

Is this dish freezer-friendly? While you can freeze the gratin, the texture may change upon reheating. For best results, enjoy it fresh or refrigerated.

How can I ensure a crispy topping? For an extra crispy crust, broil the gratin for the last 2-3 minutes of cooking. Keep a close eye on it to prevent burning.

Can I use frozen cauliflower? Yes, but make sure to thaw and drain it well to avoid excess moisture in the gratin.

Are there any other vegetables I can use? Broccoli makes a great alternative or addition to cauliflower in this recipe, maintaining a low-carb count.

Keto Cauliflower and Parmesan Gratin

This Keto Cauliflower and Parmesan Gratin is a sumptuous side dish that combines the creamy texture of cauliflower with the rich, nutty flavor of Parmesan, all baked to golden-brown perfection. It's a decadent way to enjoy your vegetables while keeping your macros in check.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Course Sides
Cuisine French
Servings 6 people
Calories 290 kcal


  • 9x13 inch baking dish
  • Large pot
  • Saucepan
  • Colander
  • Cheese grater


  • 1 large head cauliflower approx. 2 pounds or 900g, cut into florets
  • 2 tbsp unsalted butter 30g
  • 1 cup heavy cream 240ml
  • 1 tsp garlic powder 3g
  • ½ tsp onion powder 1g
  • ½ tsp mustard powder 1g
  • ¼ tsp ground nutmeg 0.5g
  • Salt and pepper to taste
  • 1 ½ cups grated Parmesan cheese 150g
  • ½ cup shredded mozzarella cheese 50g
  • Fresh thyme leaves for garnish (optional)


  • Preheat your oven to 375°F (190°C). Grease a 9x13 inch baking dish with butter or non-stick cooking spray.
  • Bring a large pot of salted water to a boil. Add the cauliflower florets and cook for 5 minutes until they are just tender. Drain well and set aside.
  • In a saucepan over medium heat, melt the butter. Add the heavy cream, garlic powder, onion powder, mustard powder, nutmeg, and a pinch of salt and pepper. Stir to combine and bring to a simmer.
  • Once simmering, remove the saucepan from the heat, and stir in 1 cup of the grated Parmesan cheese until it's completely melted into the sauce.
  • Place the blanched cauliflower florets into the prepared baking dish, and pour the Parmesan cream sauce evenly over the top.
  • Sprinkle the remaining 1/2 cup of Parmesan cheese and the mozzarella cheese over the sauced cauliflower.
  • Bake in the preheated oven for 25 minutes, or until the top is golden brown and bubbly.
  • Garnish with fresh thyme leaves before serving, if desired.


For a crispy topping, broil the gratin for the final 2-3 minutes of cooking. Watch closely to prevent burning. To make this dish ahead of time, prepare up to the point of baking, cover, and refrigerate. Add an extra 5-10 minutes to the cooking time if baking from chilled.


Calories: 290kcalCarbohydrates: 8gProtein: 12gFat: 24gFiber: 3gNet Carbs: 5g
Keyword Keto Cauliflower Gratin, Keto Sides, Low Carb Cauliflower Bake, Parmesan Cauliflower
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