Cheesy cauliflower gratin is a comforting baked side dish made with tender cauliflower florets, creamy cheddar sauce, and a golden Parmesan breadcrumb topping. Garlic, Dijon mustard, and a touch of nutmeg add depth to the sauce without overpowering the mild flavor of the cauliflower.
This easy cauliflower gratin is a delicious addition to holiday dinners, Sunday meals, and everyday family cooking. It uses simple ingredients, bakes in one dish, and pairs well with roasted meats, chicken, and other vegetable sides.
Why You’ll Love This Recipe
- Simple ingredients: Fresh cauliflower, milk, butter, and everyday cheeses create a satisfying side dish.
- Creamy homemade sauce: The cheddar and Parmesan sauce coats the florets without requiring complicated techniques.
- Golden topping: Panko breadcrumbs add a lightly crisp contrast to the soft cauliflower and creamy sauce.
- Easy to prepare ahead: You can prepare the cauliflower and cheese sauce separately before assembling.
- Flexible cheese options: Gruyère and Monterey Jack work well alongside or in place of cheddar.
Ingredients You’ll Need
- Cauliflower: One medium head of cauliflower, cut into evenly sized florets, provides the base. Choose a firm head with tightly packed florets.
- Unsalted butter: Butter creates the base of the cheese sauce and helps bind the flour into a smooth roux.
- All-purpose flour: Flour thickens the milk into a creamy sauce that clings to the cauliflower.
- Whole milk: Whole milk gives the sauce a smooth consistency and a richer texture than lower-fat milk.
- Sharp cheddar cheese: Cheddar provides the main cheesy flavor. Gruyère or Monterey Jack can be used as alternatives.
Chef’s Tip: Drain the blanched cauliflower thoroughly and let it sit in the colander for a few minutes before assembling. Removing excess moisture helps keep the cheese sauce thick and creamy during baking.
Cheesy Cauliflower Gratin Recipe
Cheesy cauliflower gratin is a comforting baked side dish featuring tender cauliflower florets covered in a creamy cheese sauce and finished with a golden, lightly crisp topping. The combination of sharp cheddar, Parmesan, garlic, and a hint of nutmeg gives the sauce a rich flavor that complements the mild taste of cauliflower.This easy cauliflower gratin is a lovely addition to holiday dinners, Sunday meals, or everyday family cooking. It uses simple ingredients, comes together in one baking dish, and pairs well with roasted meats, chicken, and other vegetable sides.
Equipment
- Large pot
- Colander
- Medium saucepan
- Whisk
- Cutting board and knife
- Measuring cups and spoons
- 9 x 9-inch baking dish
- Cheese grater
Ingredients
- For the Cheese Sauce
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cups whole milk
- 1 cup shredded sharp cheddar cheese
- 1/2 cup grated Parmesan cheese
- 2 cloves garlic minced
- 1/2 teaspoon Dijon mustard
- 1/4 teaspoon ground nutmeg
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
For the Topping
- 1/3 cup panko breadcrumbs
- 2 tablespoons grated Parmesan cheese
- 1 tablespoon melted butter
- 1 tablespoon chopped fresh parsley
Instructions
- Preheat the oven to 375°F (190°C). Lightly grease a 9 x 9-inch baking dish. Wash the cauliflower, remove the leaves and core, and cut it into evenly sized florets.
- Bring a large pot of salted water to a boil. Add the cauliflower and cook for 4–5 minutes, until just tender but still holding its shape. Drain thoroughly and let the florets sit for a few minutes to release excess moisture.
- Melt the butter in a medium saucepan over medium heat. Add the minced garlic and cook for about 30 seconds. Whisk in the flour and cook for 1 minute, stirring constantly to form a smooth paste.
- Gradually pour in the milk while whisking to prevent lumps. Continue cooking for 4–5 minutes until the sauce thickens enough to coat the back of a spoon.
- Reduce the heat to low. Add the cheddar, Parmesan, Dijon mustard, nutmeg, salt, and black pepper. Stir until the cheeses melt and the sauce becomes smooth and creamy. Avoid boiling the sauce after adding the cheese.
- Arrange the drained cauliflower florets in the prepared baking dish. Pour the cheese sauce evenly over the top, gently turning the florets so they are coated.
- Combine the panko breadcrumbs, Parmesan, and melted butter in a small bowl. Sprinkle the mixture evenly over the cauliflower. Bake for 20–25 minutes, until the sauce bubbles around the edges and the topping turns golden.
- Remove the gratin from the oven and let it rest for 5–10 minutes. Sprinkle with fresh parsley and serve warm while the cheese sauce is creamy.
Notes
- Drain the cauliflower very well after blanching. Excess water can make the cheese sauce thin.
- Keep the florets slightly firm before baking so they do not become mushy in the oven.
- Sharp cheddar gives the gratin a stronger cheese flavor. Gruyère or Monterey Jack can also be used.
- Grate cheese from a block when possible, as it melts more smoothly than many pre-shredded varieties.
- For a gluten-free version, use a gluten-free flour blend and gluten-free breadcrumbs.
Nutrition Information
| Nutrient | Amount |
|---|---|
| Calories | 285 kcal |
| Carbohydrates | 21 g |
| Protein | 13 g |
| Fat | 18 g |
| Fiber | 3 g |
| Sugar | 7 g |
| Sodium | 590 mg |
Delicious Variations to Try
- Gruyère cauliflower gratin: Replace some or all of the cheddar with Gruyère for a nuttier, more savory cheese flavor.
- Three-cheese gratin: Combine cheddar, Parmesan, and Gruyère for a more complex cheese sauce.
- Garlic herb version: Add a little fresh thyme or rosemary to the sauce for an aromatic variation.
- Spicy cauliflower gratin: Add a pinch of cayenne pepper or red pepper flakes to the cheese sauce.
- Broccoli and cauliflower gratin: Replace part of the cauliflower with blanched broccoli florets.
- Gluten-free gratin: Use a gluten-free flour blend and certified gluten-free panko breadcrumbs.
What to Serve with Cauliflower Gratin
- Cheesy Broccoli Rice Casserole Recipe
- Homemade Green Bean Casserole Recipe
- Maple Glazed Roasted Carrots Recipe
- Cheesy Broccoli Rice Casserole Recipe
- Cream Cheese Stuffed Mushrooms Recipe
Frequently Asked Questions
- Can I use frozen cauliflower for this gratin?
Yes. Thaw the cauliflower completely and drain it very well before assembling. Frozen cauliflower can release more moisture than fresh, so removing excess water is especially important. - What cheese melts best in cauliflower gratin?
Sharp cheddar, Gruyère, and Monterey Jack are all suitable choices. Freshly grated cheese generally melts more smoothly than pre-shredded cheese. - Why is Dijon mustard added to the cheese sauce?
Dijon mustard adds a mild tang that balances the richness of the butter, milk, and cheese. It enhances the savory flavor without making the sauce taste strongly of mustard. - Can I make cauliflower gratin without breadcrumbs?
Yes. You can leave off the breadcrumb topping and sprinkle extra Parmesan over the cheese sauce instead. The surface will be less crisp but will still bake into a cheesy topping. - How do I know when cauliflower gratin is done?
The sauce should bubble around the edges, and the breadcrumb topping should be golden. The cauliflower should be tender when pierced with a fork but should still hold its shape. - Can I use a different baking dish?
Yes. A similarly sized oven-safe baking dish will work. Choose one that allows the cauliflower to sit in a fairly even layer so the sauce and topping distribute properly. - Can I make this recipe without Dijon mustard?
Yes. You can omit it if needed. The cheese sauce will still thicken and taste creamy, although it will have slightly less tang.
