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Preheat oven to 375°F. Lightly grease a 9x13 inch baking dish.

Bring a large pot of salted water to a boil. Add the trimmed and halved Brussels sprouts and blanch for 3-4 minutes, until tender-crisp. Drain well and immediately plunge into an ice bath to stop cooking. Drain again thoroughly and pat dry with paper towels.

In a medium saucepan, melt the unsalted butter over medium heat. Whisk in the all-purpose flour and cook for 1-2 minutes, stirring constantly, to create a roux.

Gradually whisk in the whole milk and heavy cream, a little at a time, until smooth and no lumps remain. Continue to cook, stirring frequently, until the sauce thickens, about 5-7 minutes.

Remove the saucepan from the heat. Stir in the grated nutmeg, Dijon mustard, 1/2 cup of Parmesan cheese, kosher salt, and black pepper. Taste and adjust seasoning as needed.

Add the blanched Brussels sprouts to the cheese sauce and stir gently to coat them evenly.

Pour the Brussels sprout mixture into the prepared baking dish. Sprinkle the remaining Parmesan cheese and panko breadcrumbs over the top.

Bake for 20-25 minutes, or until bubbly and the topping is golden brown. Let stand for 5 minutes before serving.


Preheat oven to 375°F. Lightly grease a 9x13 inch baking dish.

Bring a large pot of salted water to a boil. Add the trimmed and halved Brussels sprouts and blanch for 3-4 minutes, until tender-crisp. Drain well and immediately plunge into an ice bath to stop cooking. Drain again thoroughly and pat dry with paper towels.

In a medium saucepan, melt the unsalted butter over medium heat. Whisk in the all-purpose flour and cook for 1-2 minutes, stirring constantly, to create a roux.

Gradually whisk in the whole milk and heavy cream, a little at a time, until smooth and no lumps remain. Continue to cook, stirring frequently, until the sauce thickens, about 5-7 minutes.

Remove the saucepan from the heat. Stir in the grated nutmeg, Dijon mustard, 1/2 cup of Parmesan cheese, kosher salt, and black pepper. Taste and adjust seasoning as needed.

Add the blanched Brussels sprouts to the cheese sauce and stir gently to coat them evenly.

Pour the Brussels sprout mixture into the prepared baking dish. Sprinkle the remaining Parmesan cheese and panko breadcrumbs over the top.

Bake for 20-25 minutes, or until bubbly and the topping is golden brown. Let stand for 5 minutes before serving.
