This ultimate Bacon Brussels Sprouts Gratin is a rich, comforting dish that brings together the best of smoky bacon, caramelized Brussels sprouts, and a creamy, cheesy sauce. Whether served as a side for a festive holiday meal or enjoyed as a hearty main course, this gratin is a guaranteed crowd-pleaser. The combination of crispy bacon and velvety cheddar sauce perfectly complements the slightly sweet, roasted Brussels sprouts. With a hint of rosemary and optional red pepper flakes, this dish is as flavorful as it is indulgent.
1. Preheat the oven to 400 degrees Fahrenheit.
2. Wash and dry Brussels sprouts, trim stems, and cut in half.
3. Toss halved Brussels sprouts with olive oil, salt, and black pepper, then spread in a baking dish.
4. Roast in the oven for 15 to 20 minutes until edges caramelize.
5. In a bowl, whisk together egg, heavy cream, garlic powder, onion powder, rosemary, and red pepper flakes. Fold in shredded cheddar and fontina cheese.
6. Sprinkle ¾ of the crumbled bacon over the roasted Brussels sprouts, pour cheese mixture on top, and add remaining bacon.
7. Reduce oven temperature to 350 degrees Fahrenheit and bake for 20 to 25 minutes until cheese is melted and golden brown.
8. Let the gratin rest for 5 minutes before serving, ensuring each portion includes Brussels sprouts, bacon, and cheese. Garnish with fresh rosemary.
For an extra crispy topping, broil the gratin for 2-3 minutes after baking until the top turns golden brown. You can also add toasted breadcrumbs for a bit of crunch.
For an extra crispy topping, broil the gratin for 2-3 minutes after baking until the top turns golden brown. You can also add toasted breadcrumbs for a bit of crunch.