Cheesy Brussel Sprout Casserole Recipe

If cozy comfort food is calling your name, this Cheesy Brussel Sprout Casserole Recipe will answer with a golden, bubbling hug from the oven. Prepare to fall in love with caramelized roasted Brussels sprouts wrapped in a lush, garlicky cream sauce under a gooey, golden blanket of mozzarella and savory parmesan. The flavors are decadent yet fresh, the texture is irresistibly creamy with a touch of crunch, and it turns even the most skeptical brussel sprout naysayer into a believer. Whether you’re making it for the holidays, Sunday dinner, or just because, this casserole will steal the show (and probably all your leftovers).

Ingredients You’ll Need

Every ingredient in this Cheesy Brussel Sprout Casserole Recipe plays a vital role—think of it as a little orchestra, each note contributing its own magic to the final symphony of flavor and texture. Gather these simple yet essential items, and you’re well on your way to casserole greatness.

• Brussels sprouts: Trimmed and halved, these little cabbages roast up caramelized and sweet at the edges.
• Oil: Olive oil or any neutral oil encourages that gorgeous roast and prevents sticking.
• Salt: Seasoning is everything—layering the salt ensures every bite is delicious.
• Freshly cracked black pepper: The bold, citrusy pop of fresh pepper balances the richness of the cheese and cream.
• Heavy cream: This is the secret to that ultra-silky, luxurious sauce.
• Garlic: Freshly minced for the best flavor, it infuses the whole casserole with incredible aroma and depth.
• Italian seasoning: Brings a bright, herby flourish to balance all the creaminess.
• Shredded parmesan cheese (or asiago), divided: Adds both salty umami and lovely golden color when baked.
• Shredded mozzarella cheese, divided: This is your oozy, bubbly cheese layer—don’t skimp!

How to Make Cheesy Brussel Sprout Casserole Recipe

Step 1: Prep Your Dish

Start by preheating your oven to 400°F, so it’s hot and ready when your casserole is assembled. Generously butter a 12-inch cast iron skillet or a small casserole dish (a 9×9 pan works perfectly). That little slick of butter not only adds flavor but helps guarantee every cheesy bite releases easily later.

Step 2: Roast the Brussels Sprouts

Toss your trimmed and halved Brussels sprouts with the oil right on a parchment-lined baking sheet. Sprinkle with half of the salt and pepper, then roast for about 12 minutes. This step brings out their natural sweetness and develops those crave-worthy golden edges—worth every minute. Let them cool for 5 minutes once they’re out of the oven.

Step 3: Make the Creamy Cheese Mixture

In a large bowl, mix together the heavy cream, minced garlic, Italian seasoning, 3/4 cup of parmesan, 1 cup of mozzarella, and the remaining salt and pepper. Stir well so the garlic and seasoning permeate every bit of cream and cheese—this is what will coat the sprouts in rich goodness.

Step 4: Fold and Fill

Gently fold the roasted brussels sprouts into your cheese and cream mixture. Pour everything into your buttered skillet or casserole dish, spreading the sprouts out in a cozy, creamy layer. Top with the remaining parmesan (1/4 cup) and the last 1/2 cup of mozzarella to create that irresistible bubbling crust.

Step 5: Bake Until Bubbly

Slide your dish into the oven and bake for 25 to 30 minutes. It’s ready when the cheese is bubbling furiously and the edges are deeply golden brown. Let it rest for five minutes out of the oven before you serve—this lets the sauce thicken into luscious perfection.

How to Serve Cheesy Brussel Sprout Casserole Recipe

Garnishes

For a fresh pop at the table, scatter a handful of chopped fresh parsley or chives over the casserole before serving. Even a light zest of lemon or a dash of chili flakes can elevate the rich flavors without adding fuss. It’s all about contrasting that creamy, savory interior with a little brightness on top.

Side Dishes

This Cheesy Brussel Sprout Casserole Recipe pairs gorgeously with roasted chicken, grilled pork, or a holiday ham. It also makes a stellar centerpiece on a vegetarian spread, served alongside herbed rice, crusty bread, or a tangy green salad to cut through all that cheesy indulgence.

Creative Ways to Present

Serve mini portions in individual ramekins for a dinner party, or go rustic and let guests help themselves straight from the cast iron skillet—it’s guaranteed to impress either way. Leftovers make an indulgent brunch side with scrambled eggs and crispy bacon.

Make Ahead and Storage

Storing Leftovers

Let your leftover Cheesy Brussel Sprout Casserole Recipe cool completely before covering and transferring to the refrigerator. Stored in an airtight container, it’ll keep beautifully for up to 3 days—perfect for a quick lunch or an easy next-day dinner.

Freezing

For longer storage, you can freeze the fully baked casserole in a freezer-safe dish. Wrap tightly in foil and freeze for up to 2 months. To preserve the cheese’s texture, avoid thawing and refreezing multiple times.

Reheating

Reheat straight from the fridge by covering with foil and warming in a 350°F oven until hot and bubbly, about 20 minutes. For single servings, a quick zap in the microwave on medium power does the trick, though the oven method keeps the top beautifully crisp.

FAQs

Can I use frozen Brussels sprouts instead of fresh?

Fresh is best for this Cheesy Brussel Sprout Casserole Recipe, especially for caramelization and texture, but thawed and thoroughly dried frozen Brussels sprouts can work in a pinch. Just roast them a few minutes longer to drive off excess moisture.

What cheese substitutions work well here?

You can swap parmesan for asiago, or mozzarella for fontina or gouda for a slightly different cheesy melt. The key is to use cheeses that melt smoothly and complement the creamy sauce.

How can I make this vegetarian or gluten free?

Great news: this Cheesy Brussel Sprout Casserole Recipe is naturally gluten free. It’s also vegetarian as long as your cheese is made with vegetarian rennet (double check your labels!).

Can I prepare the casserole in advance?

Absolutely—assemble everything (except the final cheese topping), cover, and chill up to a day ahead. When ready to bake, add the cheese on top and proceed. You may need to add a few extra minutes in the oven since it’s starting from chilled.

What proteins pair well with this dish?

Roast chicken, baked salmon, or a glazed holiday ham are all fantastic with this cheesy casserole. Or serve it with a fried egg or veggie sausage for a decadent brunch option.

Final Thoughts

Once you’ve tasted this Cheesy Brussel Sprout Casserole Recipe, you’ll have a new cozy classic on your hands. I hope it brings warmth, full bellies, and lots of smiles to your table. Give it a try and see just how easy and delicious cheesy Brussels sprouts can be!

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