Brussels Sprouts Gratin (With VIDEO)

There are some dishes that people always go for seconds or thirds. This is one of those dishes.

We love everything about this amazing side dish. You get the deep flavor from the roasted sprouts, but the smoked gruyere cream sauce puts it over the top. Even folks who don't like Brussels sprouts love this dish.

How To Make Brussels Sprouts Gratin

There are so many things to love about this dish.

First, and foremost, it's irresistibly delicious. But, it's also simple to prepare and can even be made a day in advance, up to baking.

Talk about the perfect holiday side dish!

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How To Roast Brussels Sprouts

We highly recommend roasting the Brussels sprouts before baking them.

Roasting deepens the flavor of the vegetable and also softens them which makes the texture of the dish perfect.

EXPERT TIP: You don't need to trim the sprouts before roasting. Give them a quick rinse, pat them dry, and place them in a bowl. Toss them with a couple of tablespoons of olive oil, a tsp or so of salt and pepper, and then roast on a baking sheet in a 400°F oven for 20 minutes, flipping halfway through.

Before Roasting

After Roasting

Creating a Deeply Flavorful Sauce

We start building the sauce by first cooking up cubed pancetta. Pancetta and Brussels sprouts just go together so perfectly.

For the cheese, we tested many different types and our favorite is smoked gruyere. Not too smokey, but deeply flavorful, and just the perfect taste for the flavor profile we were looking for.

EXPERT TIP: To make the dish vegetarian, simply omit the pancetta and make the roux with melted butter or oil. Other cheeses that we liked included regular Gruyere (not smoked), fontina, and white cheddar.

Pour that glorious sauce all over the roughly chopped roasted sprouts in a 2-qt. baking dish.

Topping the Brussel sprouts gratin with a butter and breadcrumb mixture adds that crunchy addition that works perfectly with the creamy sauce and soft sprouts.

Simply toss ¾ cup of breadcrumbs (we love Panko for the extra texture) with 3 tablespoons of melted butter and mix. Sprinkle all over the top of the gratin.

EXPERT TIP: If you leave the Brussels sprouts in large pieces, for example halved (instead of quartered), you'll need to allow the gratin to bake for 20 to 25 minutes to allow them to get nice and soft. This may mean the breadcrumb mixture starts to brown a little too much on top. Keep an eye on them, once they reach the golden color, cover the dish with foil for the remainder of the bake time.

Other Classic Holiday Side Dishes

This dish really is the perfect side dish for Thanksgiving or any special occasion meal.

Other family-favorite holiday side dishes:

Best Mashed Potatoes
Cornbread and Sausage Dressing
Gourmet Green Bean Casserole
Corn Casserole
Baked Leek Gratin
Maple-Orange Cranberry Sauce
Homemade Cornbread

And folks, we've just got to say it again: One bite of this dish, and your loved ones will be side dish heaven.

We love cooking with Brussels sprouts, other favorite dishes included

Shaved Brussels Sprouts with Balsamic
Maple-Roasted Brussels Sprouts Bacon and Pecans
Brussels Sprouts with Sherry Vinaigrette

And this particular dish is one of the very best side dishes we've ever served or eaten.

It's really that good.

Ready to make a holiday side dish that even non-veggie lovers will love? Go for it!

And when you do, be sure to take a photo of it, post it on Instagram, and tag @HowToFeedaLoon and hashtag #HowToFeedaLoon!