Description

This Cheesy Brussel Sprout Casserole is a creamy, garlicky side dish featuring roasted Brussels sprouts folded into a rich parmesan and mozzarella sauce then baked until golden and bubbly. It’s a cozy and comforting vegetable dish perfect for holidays or weeknights, turning everyday sprouts into a crowd-pleasing favorite.

Ingredients

Scale

Brussels Sprouts

3 cups Brussels sprouts, bottoms removed and halved
1 tablespoon oil
1 teaspoon salt, divided
1 teaspoon freshly cracked black pepper, divided

Sauce and Cheese

1 cup heavy cream
4 cloves garlic, minced
1 tablespoon Italian seasoning
1 cup shredded parmesan cheese (or asiago), divided
1 ½ cups shredded mozzarella cheese, divided

Instructions

Preheat and Prepare: Preheat your oven to 400°F and butter a 12-inch cast iron skillet or a 9×9 casserole dish, then set it aside.
Roast Brussels Sprouts: Toss the Brussels sprouts with oil and spread them on a parchment-lined baking sheet. Sprinkle with ½ teaspoon salt and ½ teaspoon pepper. Roast in the oven for 12 minutes. Remove and let cool for 5 minutes.
Mix Cream Sauce: In a large bowl, combine heavy cream, minced garlic, Italian seasoning, ¾ cup parmesan, 1 cup mozzarella, and the remaining ½ teaspoon salt and ½ teaspoon pepper. Stir well to create a creamy sauce.
Combine and Transfer: Gently fold the roasted Brussels sprouts into the cream mixture until they are evenly coated. Pour the mixture into the prepared skillet or casserole dish.
Add Topping and Bake: Sprinkle the remaining ¼ cup parmesan and ½ cup mozzarella evenly over the top. Bake for 25–30 minutes until the casserole is bubbly and golden brown on top.
Rest and Serve: Let the casserole rest for 5 minutes before serving. Serve warm and enjoy!

Notes

For extra browning, broil for 1–2 minutes at the end but watch closely to prevent burning.
Freshly shredded cheese melts smoother than pre-shredded cheese.
This casserole can be assembled up to 24 hours ahead and baked when ready.
Store leftovers in an airtight container in the refrigerator for 3–4 days.

Prep Time: 10 minutes
Cook Time: 40 minutes
Category: Side Dish
Method: Baking
Cuisine: American

Keywords: Cheesy Brussel Sprout Casserole, roasted Brussels sprouts, cheesy vegetable casserole, creamy vegetable bake, holiday side dish