Cauliflower Gratin

Cauliflower Gratin is great as a side or meatless main dish and easy to prepare. Using my favorite Swiss and Parmesan cheeses along with a touch of nutmeg, this is true comfort food that’s ready in no time. 

I love a recipe that works as both a comforting side dish and a satisfying meatless main, and this Cauliflower Gratin does exactly that. Tender cauliflower is coated in a creamy cheese sauce made with Swiss and Parmesan, then baked until golden and bubbling on top.

It’s rich, cozy, and surprisingly easy to make. Whether you’re serving it alongside roasted meats for a holiday dinner or enjoying it as a simple vegetarian meal, this gratin always feels special without requiring much effort.

What Is a Gratin?

A gratin is a classic French dish known for its golden, crispy topping. The signature crust is usually made with breadcrumbs, grated cheese, butter, or eggs and baked in a shallow dish until bubbling and beautifully browned. In this Cauliflower Gratin, the creamy sauce is topped with Swiss and Parmesan cheeses, which melt into a perfectly rich, slightly crisp layer that defines a true gratin.

Why You’ll Love This Cauliflower Gratin

• Creamy, cheesy comfort food – Every bite is rich, buttery, and cozy, with a velvety cheese sauce that clings to each tender floret.

• Simple ingredients, big flavor – You probably already have everything on hand: butter, flour, milk, and cheese. Nothing fancy, just real ingredients done right.

• Quick to make – A speedy microwave step softens the cauliflower before baking, so it’s oven-ready in minutes.

• A lighter spin on classic gratin – You get all the indulgent flavor of a potato gratin, but with the wholesome twist of cauliflower.

• Easy to customize – Try mixing in broccoli, switching up the cheeses, or adding a touch of spice for your own version.

• Perfect make-ahead side – It reheats beautifully, making it great for dinner prep or holiday spreads.

• Crowd-pleasing and elegant – Whether it’s a weeknight dinner or a Thanksgiving table, it looks (and tastes) like you worked much harder than you did.

What Cheese Is Best for Cauliflower Gratin?

Short answer: The best cheeses for cauliflower gratin are Swiss and Parmesan for flavor and browning, with mozzarella or cheddar added for extra melt and creaminess.

Full answer:
The best cheese for Cauliflower Gratin is one that melts smoothly and adds rich, savory flavor. I love using a mix of Swiss and Parmesan—they create a creamy sauce with a perfectly golden, bubbly crust. For extra stretch and that classic cheesy pull, add a little mozzarella.
If you prefer a milder flavor, try Monterey Jack or Colby Jack with a touch of cheddar. And for a sharper, bolder gratin, use extra sharp cheddar or even Pepper Jack for a little heat and kick.

Why Cauliflower Gratin Is a Perfect Side Dish for Holiday Meals

Holiday dinners often include rich main dishes like ham, roast beef, or lamb. Cauliflower Gratin makes a wonderful side dish because it delivers all the creamy comfort of a classic potato gratin while adding a lighter vegetable option to the table.

The golden cheese topping and creamy sauce make it feel just as indulgent as traditional holiday sides, but the cauliflower keeps the dish balanced and flavorful. It’s a beautiful addition to Easter dinner, Thanksgiving, or any special gathering.

How to Make Cauliflower Gratin

1. Prep the cauliflower:
   Place the cauliflower florets in a microwave-safe dish and cover with a damp paper towel. Microwave on high for about 5 minutes, until just tender. This step replaces pre-boiling and saves time.

2. Make the roux:
   In a small saucepan, melt the butter over medium heat. Add the flour and whisk until it forms a smooth, bubbly paste.

3. Create the cheese sauce:
   Gradually whisk in the milk and continue stirring until the sauce becomes thick and creamy—this only takes a few minutes.

4. Add flavor:
   Stir in half of the cheese along with salt, pepper, and a touch of nutmeg (or substitute ground mustard for a different flavor).

5. Assemble the gratin:
   Place the cauliflower in an 8×8-inch baking dish and pour the cheese sauce evenly over the top. Sprinkle with the remaining Swiss and Parmesan cheeses.

6. Bake until golden:
   Bake uncovered at 425°F for 15–20 minutes, until the top is bubbly, lightly browned, and deliciously gooey.

7. Serve and enjoy:
   Let the gratin rest for a few minutes before serving—it’s creamy, comforting, and perfect alongside roasted meats or a crisp green salad.

Cauliflower Gratin is simple, satisfying, and incredibly versatile. You can experiment with different cheeses or add fresh herbs like thyme, rosemary, or sage to change the flavor slightly. The cauliflower stays tender without becoming mushy, and the creamy cheese sauce makes every bite comforting and delicious.

If you’re looking for more delicious, cheesy recipes, try My Best Grilled Cheese Sandwiches, and a family favorite, Scalloped Hasselback Potatoes, or my classic Grandma’s Mac and Cheese.

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5 from 5 votes

Cauliflower Gratin

Make this for an impressive side to any meal of for a meatless main dish. Use one of the cheeses listed below or substitute your own but it should be a sharp cheese.

Course Side Dish or Vegetarian Main Dish

Prep Time 10 minutes minutes

Cook Time 15 minutes minutes

Total Time 25 minutes minutes

Servings 6 side portions

Calories 205

Author Good Dinner Mom

Cook ModePrevent your screen from going dark

Ingredients 

1x2x3x

• 1 small head cauliflower, cut into florets (about 6 cups)
• 4 Tbsps butter
• 3 Tbsps all-purpose flour
• 1 ½ cups milk
• Sea salt and ground pepper, to taste
• ¼ tsp teaspoon ground nutmeg, or more to taste
• 1 cup grated Swiss cheese, divided
• ¼ cup shredded parmesan

Instructions

• Preheat the oven to 425 degrees F.
• Place cauliflower florets on a microwave-safe plate and cover with wet paper towel.
  1 small head cauliflower,
• Microwave on high for about 5 minutes, until crisp-tender.
• Place the cauliflower in a single layer into an 8x8 inch baking dish.
• Melt butter in a small sauce pan over medium heat.
  4 Tbsps butter
• Add flour and whisk until it makes a bubbly paste.
  3 Tbsps all-purpose flour
• Gradually add milk and stir until the sauce becomes thick and creamy.
  1 ½ cups milk
• Remove from heat and add salt, pepper, nutmeg and ½ cup of the Swiss cheese. (Do not add the parmesan yet.)
  Sea salt and ground pepper,, ¼ tsp teaspoon ground nutmeg,, 1 cup grated Swiss cheese,
• Spoon the sauce over the cauliflower florets and sprinkle with remaining ½ cup Swiss cheese as well as the ¼ cup Parmesan cheese.
  ¼ cup shredded parmesan
• Bake uncovered for 15 to 20 minutes until the cheese sauce is soft and slightly golden.

Notes

• For extra melty cheese, add ¼ cup shredded mozzarella to the sauce for a stretchier, creamier texture.
• You can experiment with extra sharp cheese, Pepper Jack cheese, or mild cheddar, if you don't like sharp cheese.
• The Cauliflower Gratin can be refrigerated for up to two days and reheated in a 400F degree oven, covered in foil.
• Feel free to replace half of the cauliflower with broccoli for a colorful gratin. Broccoli and cauliflower pair so well together! If you make this combo gratin, I'd replace the nutmeg with either ground mustard or some red pepper flakes.

Nutrition Facts

Cauliflower Gratin

Amount Per Serving (1 g)

Calories 205 Calories from Fat 144

% Daily Value*

Fat 16g25%

Saturated Fat 10g63%

Trans Fat 0.3g

Polyunsaturated Fat 1g

Monounsaturated Fat 4g

Cholesterol 47mg16%

Sodium 184mg8%

Potassium 121mg3%

Carbohydrates 6g2%

Fiber 0.1g0%

Sugar 3g3%

Protein 9g18%

Vitamin A 514IU10%

Vitamin C 1mg1%

Calcium 288mg29%

Iron 0.2mg1%

* Percent Daily Values are based on a 2000 calorie diet.