Name: Cheesy Brussels Sprout Gratin Recipe
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Ingredients: 1 ½ pounds Brussels sprouts, trimmed and halved; 2 tablespoons olive oil; Salt and freshly ground black pepper, to taste; 3 tablespoons unsalted butter; 3 tablespoons all-purpose flour; 2 cups whole milk; ½ teaspoon garlic powder; ½ teaspoon onion powder; ¼ teaspoon ground nutmeg; 1 cup grated Gruyère cheese; ½ cup grated Parmesan cheese; ½ cup breadcrumbs (optional); 2 teaspoons Dijon mustard; 1 teaspoon fresh thyme leaves (optional)

Description

This Cheesy Brussels Sprout Gratin transforms a simple vegetable into a rich, comforting side dish perfect for cozy dinners or holiday feasts. Roasting the sprouts enhances their natural sweetness, while a creamy cheese sauce and a golden, crispy topping make this gratin irresistible. Inspired by classic French recipes, it’s a dish that will impress guests and even convert Brussels sprout skeptics.

Ingredients

Scale

1 ½ pounds Brussels sprouts, trimmed and halved
2 tablespoons olive oil
Salt and freshly ground black pepper, to taste
3 tablespoons unsalted butter
3 tablespoons all-purpose flour
2 cups whole milk
½ teaspoon garlic powder
½ teaspoon onion powder
¼ teaspoon ground nutmeg
1 cup grated Gruyère cheese
½ cup grated Parmesan cheese
½ cup breadcrumbs (optional)
2 teaspoons Dijon mustard
1 teaspoon fresh thyme leaves (optional)

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Instructions

Preheat the oven to 400°F (200°C) and lightly grease a 9×13-inch baking dish.
Trim and halve the Brussels sprouts. Toss with olive oil, salt, and pepper, then roast for 15-20 minutes until tender and lightly browned.
In a medium saucepan, melt butter over medium heat. Whisk in flour and cook 1-2 minutes. Gradually add milk, whisking until smooth. Stir in garlic powder, onion powder, nutmeg, salt, and pepper.
Remove from heat and stir in Gruyère cheese and Dijon mustard until smooth. Adjust seasoning as needed.
Place roasted sprouts in the prepared baking dish and pour the cheese sauce over them, stirring gently to coat.
Mix Parmesan and breadcrumbs if using, then sprinkle over the top.
Bake uncovered for 20-25 minutes until golden and bubbly. Broil 2-3 minutes at the end for an extra crispy topping, if desired.
Let cool for a few minutes and garnish with fresh thyme before serving.

Notes

Use firm, fresh Brussels sprouts for the best texture.
Adjust cheese types and seasoning to taste.
Make-ahead option: Roast sprouts and prepare sauce a day in advance; bake before serving.
For extra crunch, combine panko breadcrumbs with melted butter.

Prep Time: 20 minutes
Cook Time: 45 minutes