If you’ve been searching for a comforting yet vibrant side dish that brings together the delightful bite of roasted vegetables with creamy, cheesy goodness, this Cheesy Brussels Sprouts Casserole Recipe is exactly what your kitchen needs. With roasted Brussels sprouts enveloped in a luscious blend of heavy cream, garlic, Italian seasoning, and not one but two types of melty cheeses, this casserole offers an irresistible balance of textures and flavors that will have everyone at the table asking for seconds. It’s simple enough for a weeknight meal but special enough to impress at holiday gatherings or weekend dinner parties.

Ingredients You’ll Need

A white bowl filled with a mixture of halved green Brussels sprouts and shredded white cabbage covered in a creamy, white sauce speckled with black pepper. The mixture shows a thick, smooth texture with the Brussels sprouts adding a fresh green color, layered evenly throughout. A gray spoon with traces of the sauce is placed inside the bowl, resting against the side. The bowl is set on a white marbled textured surface. photo taken with an iphone --ar 4:5 --v 7

These ingredients might look straightforward, but each plays a crucial role in turning simple Brussels sprouts into a rich, savory casserole that’s bursting with flavor and texture. From fresh veggies to luscious cheeses, every component is essential.

3 cups Brussels sprouts (bottoms removed and halved): Fresh and firm sprouts roast perfectly, adding a nutty and slightly sweet flavor.
1 tablespoon oil: Helps achieve that golden roast on the sprouts and keeps them tender inside.
1 teaspoon salt (divided): Balances and enhances all flavors throughout the dish.
1 teaspoon freshly cracked black pepper (divided): Adds a subtle kick to complement the creamy cheese sauce.
1 cup heavy cream: Creates the rich and silky base that carries the cheese and spices.
4 cloves garlic (minced): Infuses the dish with fragrant warmth and depth.
1 tablespoon Italian seasoning: Brings a herby brightness that lifts the entire casserole.
1 cup shredded parmesan cheese (or asiago, divided): Adds sharp, salty undertones and a beautiful crust on top.
1 1/2 cups shredded mozzarella cheese (divided): Provides gooey, stretchy texture that makes every bite irresistible.

How to Make Cheesy Brussels Sprouts Casserole Recipe

Step 1: Preheat and Prepare

Begin by heating your oven to 400°F. Buttering a 12-inch cast iron skillet or a 9×9 casserole dish ensures the casserole won’t stick while baking and helps develop a golden crust along the edges—a simple step that makes a huge difference.

Step 2: Roast the Brussels Sprouts

Toss the Brussels sprouts with oil, then spread them out on a parchment-lined baking sheet. Sprinkle with half the salt and pepper. Roasting at high heat for 12 minutes softens the sprouts while giving them charred, flavorful edges that add wonderful complexity to the dish.

Step 3: Mix the Creamy Cheese Sauce

In a large bowl, combine the heavy cream, minced garlic, Italian seasoning, most of the parmesan and mozzarella cheeses, and the remaining salt and pepper. This mixture is where velvety creaminess meets savory, aromatic flavor, binding the casserole together beautifully.

Step 4: Combine and Assemble

After the sprouts have cooled for a few minutes, fold them gently into the cheese sauce mixture. Transfer everything into your prepared skillet or casserole dish, then sprinkle the remaining parmesan and mozzarella evenly on top—this will give you that golden melted cheese crust we all love.

Step 5: Bake Until Bubbly

Bake the casserole for 25 to 30 minutes until it bubbles and the cheese on the edges browns enticingly. Letting it rest for 5 minutes before serving helps the casserole set up, ensuring each slice holds together beautifully with a luscious, gooey center.

How to Serve Cheesy Brussels Sprouts Casserole Recipe

A white cast iron skillet filled with Brussels sprouts covered in melted, bubbly cheese with a golden-brown top layer, some cheese strings stretching as a spoon lifts several Brussels sprouts from the creamy cheesy sauce below, showing a rich texture of cheese and sauce underneath the crispy surface, with the skillet placed on a white marbled surface; a woman's hand holds the spoon lifting the food photo taken with an iphone --ar 4:5 --v 7

Garnishes

To personalize and brighten up your Cheesy Brussels Sprouts Casserole Recipe, consider finishing with a sprinkle of freshly chopped parsley or thyme. Their fresh herbal notes contrast nicely with the richness and add a lovely pop of color. A few red pepper flakes can also work wonders if you want to add a bit of heat.

Side Dishes

This casserole pairs wonderfully with roasted meats like garlic herb chicken or a simple pork tenderloin. For a lighter pairing, serve alongside a crisp green salad with a zesty vinaigrette to cut through the creaminess and provide balance to your meal.

Creative Ways to Present

For a crowd-pleasing presentation, serve the casserole in individual ramekins rather than one big dish. You can even add a breadcrumb topping for extra crunch before baking. Alternatively, turn leftovers into a hearty breakfast by topping with a poached egg—brilliant for brunch!

Make Ahead and Storage

Storing Leftovers

Any leftovers from your Cheesy Brussels Sprouts Casserole Recipe should be placed in an airtight container and kept in the refrigerator for up to 3 days. The flavors get even better when they’ve had time to meld, and reheating gently helps maintain the creamy texture.

Freezing

This casserole freezes well—just cover tightly with foil or place in a freezer-safe container. Frozen portions will stay good for up to 2 months. When planning meals in advance, making this recipe in bulk and freezing individual servings can be a total lifesaver.

Reheating

To reheat, thaw overnight in the fridge if frozen, then warm in the oven at 350°F until heated through and bubbly, about 15-20 minutes. Avoid microwaving if you want to keep that delightful golden top; the oven helps rejuvenate its freshly baked appeal.

FAQs

Can I use frozen Brussels sprouts for this casserole?

While fresh Brussels sprouts roast better with a crisp texture and nuttier flavor, you can use frozen sprouts in a pinch. Just be sure to thaw and pat them dry first to avoid excess moisture in your casserole.

What type of cheese works best for this recipe?

The combination of parmesan and mozzarella creates a wonderful balance of sharpness and meltiness. Asiago can be swapped for parmesan if you want a slightly different sharp profile. Avoid pre-shredded cheese with added anti-caking agents for best melting.

Is this casserole suitable for meal prep?

Absolutely! The Cheesy Brussels Sprouts Casserole Recipe is fantastic for meal prep since it stores well and reheats beautifully, making it an easy go-to for lunches or dinners during the week.

Can I make this recipe vegetarian?

Yes, this casserole is naturally vegetarian as long as the cheese you use is made without animal rennet. It’s packed with veggies and cheese, making it hearty enough without any meat.

How can I add a bit more texture to the casserole?

For added crunch, sprinkle some toasted breadcrumbs or crushed nuts like walnuts on top before baking. You can also toss in some cooked bacon bits if you’re not keeping it vegetarian.

Final Thoughts

If you’re craving a side dish that marries the earthy charm of Brussels sprouts with luscious, cheesy comfort, the Cheesy Brussels Sprouts Casserole Recipe is your new go-to. It’s a dish that’s easy to make, packed with flavor, and guaranteed to bring smiles around the table. Give it a whirl—you might just find yourself making it again and again!