This Brussels Sprouts Gratin combines the nutty richness of Gruyère cheese, the savory crunch of crispy bacon, and tender Brussels sprouts in a creamy sauce that’s irresistibly comforting. Perfect as a side dish or a main course, it’s baked to bubbly, golden-brown perfection. This dish is an elegant and delicious way to elevate humble Brussels sprouts into a show-stopping centerpiece for any meal.
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$8–$12 depending on the cost of Gruyère cheese and Brussels sprouts
Large Saucepan: Used for blanching the Brussels sprouts until tender.
Heatproof Frying Pan: For frying the bacon, cooking the shallots, and making the sauce.
whisk To ensure a smooth and lump-free cheese sauce.
Oven-Safe Dish or Casserole Pan: For baking the gratin until golden and bubbly.
Ingredients
2lbssmall tender Brussels sproutstrimmed and halved
4ozthickly sliced baconchopped
3large shallotstrimmed and thinly sliced
1tbspbutter
3tbspsflour
½cupchicken broth
1½cupsmilk
1cuppacked shredded Gruyère cheeseabout 6 ounces
kosher salt and freshly ground black pepper
Instructions
Bring a large saucepan half-filled with salted water to a boil over medium-high heat. Blanch the sprouts until just tender, 3 to 7 minutes (depends on the freshness and size of the sprouts). Drain in a colander and rinse under cold water to stop the cooking.
In a large heatproof frying pan over medium heat, fry the bacon until crisp. Using a slotted spoon, transfer the bacon to paper towels. Add the shallots to the pan and fry until tender, stirring, about 5 minutes.
Drain off all but 2 tbsps fat and add the bacon and butter to the pan (if you don't have 2 tbsps bacon fat, use 2 tbsps butter).
Sprinkle the flour over the butter and cook, stirring with a whisk, until smooth. Slowly add the chicken broth, then the milk, while whisking, until thickened and smooth. Add ½ cup of the cheese and stir until smooth. Season to taste with salt and pepper.
Add the Brussels sprouts to the sauce and stir to combine. Spread evenly. Sprinkle with the remaining cheese.
Bake until bubbly and golden brown, about 30 minutes. (If you like, pop it under the broiler to brown the top a bit more.) Let sit for about 10 minutes before serving.
Notes
Usage Tips:
To achieve a perfectly crisp top, broil the gratin for 1–2 minutes after baking. Keep a close eye to prevent burning.
Use fresh and small Brussels sprouts for the best texture and flavor.
Storage:
Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven for the best texture.
Customizations:
Swap out Gruyère for Parmesan or sharp cheddar if you prefer a different flavor profile.
Add a sprinkle of breadcrumbs or panko on top before baking for extra crunch.
Make-Ahead Tips:
You can assemble the gratin a day in advance and refrigerate it. Bake it just before serving, adding 5–10 extra minutes to the cooking time.
For a creamy, cheesy, and utterly satisfying side dish, try this Brussels Sprouts Gratin with Bacon & Gruyère—it’s a guaranteed crowd-pleaser!