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Cheesy Brussel Sprout Casserole Recipe

4.5 from 129 reviews

This Cheesy Brussels Sprout Casserole combines roasted Brussels sprouts with a creamy, garlicky cheese sauce made from heavy cream, parmesan, and mozzarella. Baked until bubbly and golden, it’s a perfect comforting side dish that highlights the natural sweetness and nutty flavor of Brussels sprouts, balanced with Italian seasoning and garlic for a deliciously savory twist.

Ingredients

Scale

Vegetables

  • 3 cups Brussels sprouts (bottoms removed and halved)

Seasonings & Oils

  • 1 tablespoon oil
  • 1 teaspoon salt (divided)
  • 1 teaspoon freshly cracked black pepper (divided)
  • 1 tablespoon Italian seasoning
  • 4 cloves garlic (minced)

Dairy & Cheese

  • 1 cup heavy cream
  • 1 cup shredded parmesan cheese (or asiago, divided)
  • 1 1/2 cups shredded mozzarella cheese (divided)

Instructions

  1. Preheat and prepare dish: Preheat oven to 400°F (200°C). Butter a 12-inch round cast iron skillet or a small casserole dish (such as 9×9 inch) and set aside.
  2. Roast Brussels sprouts: Toss Brussels sprouts with oil, then arrange them evenly on a baking sheet lined with parchment paper. Sprinkle with 1/2 teaspoon salt and 1/2 teaspoon freshly cracked black pepper. Roast in the oven for 12 minutes. Remove and let cool for 5 minutes.
  3. Mix cheese sauce: In a large mixing bowl, combine heavy cream, minced garlic, Italian seasoning, 3/4 cup of shredded parmesan cheese, 1 cup mozzarella cheese, and the remaining 1/2 teaspoon salt and 1/2 teaspoon pepper.
  4. Combine and assemble casserole: Gently fold the roasted Brussels sprouts into the cheese mixture until well coated. Pour the mixture into the prepared skillet or casserole dish. Evenly sprinkle the remaining 1/4 cup parmesan and 1/2 cup mozzarella cheese over the top.
  5. Bake and serve: Bake the casserole in the preheated oven for 25 to 30 minutes until bubbly and the edges are nicely browned. Remove from oven, let rest for 5 minutes, then serve immediately.

Notes

  • Make sure to halve the Brussels sprouts evenly to ensure they roast uniformly.
  • Using a cast iron skillet adds a nice rustic presentation and helps in even baking, but a casserole dish will work just as well.
  • For a slight twist, try substituting asiago cheese for parmesan for a different flavor profile.
  • The casserole can be prepared ahead of time and baked just before serving.
  • Leftovers store well in the refrigerator for up to 3 days and can be reheated in the oven to maintain crispness.

Keywords: Brussels sprouts, casserole, cheesy, roasted vegetables, side dish, comfort food, baked, easy recipe