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Bacon Brussels Sprouts Gratin Recipe

Bacon Brussels Sprouts Gratin Recipe

Creamy, cheesy Brussels sprouts meet crispy bacon under a golden panko crust. A cozy, crowd-pleasing gratin side for any feast.
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Prep Time: 20 minutes
Cook Time: 35 minutes
Total Time: 55 minutes
Servings: 6

Ingredients
 

Main Ingredients

  • 1.75 lb Brussels sprouts, trimmed and halved
  • 6 oz thick-cut bacon, chopped
  • 3 tbsp unsalted butter
  • 0.5 cup minced shallot
  • 1 tbsp minced garlic
  • 3 tbsp all-purpose flour
  • 0.75 cup whole milk
  • 1.25 cup heavy cream
  • 1 tsp Dijon mustard
  • 1 tsp chopped fresh thyme
  • 0.25 tsp ground nutmeg
  • 1 tsp kosher salt plus more to taste
  • 0.75 tsp freshly ground black pepper
  • 1.75 cup shredded Gruyère cheese
  • 0.5 cup finely grated Parmesan
  • 0.75 cup panko breadcrumbs
  • 1 tbsp olive oil

Instructions

Preparation Steps

  • Heat oven to 400°F. Lightly butter a 9x13-inch baking dish.
  • Blanch Brussels sprouts in salted boiling water until bright and just tender, 4–5 minutes. Drain well and pat dry.
  • Cook bacon in a large skillet over medium heat until crisp. Transfer to a plate; keep about 1 tablespoon drippings in the pan.
  • Melt butter in the skillet with drippings. Sauté shallot until soft, 2–3 minutes. Stir in garlic for 30 seconds.
  • Whisk in flour and cook the roux 1 minute. Slowly add milk, then cream, whisking until smooth and slightly thickened, 3–4 minutes.
  • Season with Dijon, thyme, nutmeg, salt, and pepper. Off heat, fold in half the Gruyère and half the Parmesan until melted.
  • Combine sauce with Brussels sprouts and half the bacon. Spread in the baking dish. Top with remaining cheeses.
  • Toss panko with olive oil and a pinch of salt. Sprinkle over the top with remaining bacon.
  • Bake until bubbling and golden, 18–22 minutes. Broil 1–2 minutes for extra color. Rest 10 minutes before serving.

Notes

Variation: Swap Gruyère for sharp white cheddar, or add a pinch of red pepper flakes for gentle heat. Make-ahead: Assemble up to 1 day in advance; cover and refrigerate. Bake covered 10 minutes, then uncover and finish until bubbling. Leftovers reheat well at 350°F for 12–15 minutes.
This recipe is an original creation inspired by classic Bacon Brussels Sprouts Gratin Recipe flavors. All ingredient ratios and instructions are independently developed.