1-First Step: Prepare the Brussels Sprouts
Preheat your oven to 350-375°F (175-190°C). Begin by washing your Brussels sprouts thoroughly, trimming off any tough or discolored ends. Cut the sprouts into halves or quarters depending on their size, removing the bottom rim if you prefer. This preparation sets the foundation for even cooking and optimal texture in your creamy Brussels sprouts bake.

2-Second Step: Sauté Aromatics and Brussels Sprouts
Heat 1 tablespoon of olive oil and 2 tablespoons of butter in a large oven-safe skillet or pan over medium-high heat. Add the minced garlic or shallot and sauté gently for 1 to 2 minutes until fragrant, making sure not to brown or burn the garlic. Add the prepared Brussels sprouts to the skillet, season with 1/4 teaspoon salt, 1/8 teaspoon black pepper, and the optional garlic powder and nutmeg. Sauté the sprouts for approximately 5 minutes, stirring occasionally, so they begin to soften and brown slightly, enhancing their natural flavor.

3-Third Step: Deglaze and Simmer
Pour in the 1/2 cup chicken broth to deglaze the pan, stirring carefully to lift all caramelized bits from the skillet. Continue cooking for an additional 5 minutes or until most of the liquid has evaporated and the Brussels sprouts are tender but still have a bit of bite. This step is crucial for building the depth of flavor and ensures the sprouts are perfectly cooked before baking.

4-Fourth Step: Combine Cream and Cheese
Remove the skillet from heat. Stir in 1 cup of heavy cream (or preferred milk alternative) along with 1 cup of shredded white cheese and 1/4 cup Parmesan. If using bacon slices, mix in the cooked and diced bacon pieces now for an added smoky dimension. The mixture will be rich and creamy, enveloping the tender sprouts in luscious texture. Adjust seasoning as needed.

5-Fifth Step: Add Final Topping and Bake
Sprinkle the reserved 1/2 cup shredded cheese evenly over the top of the Brussels sprouts mixture. If your skillet is not oven-safe, transfer the entire mixture into a suitable baking dish. Place the dish in the preheated oven and bake uncovered for 18 to 30 minutes. Bake until the sauce is bubbly and the cheese topping has melted and turned lightly golden brown. For an extra golden top, broil the casserole for an additional 1 minute, watching closely to prevent burning.

6-Final Step: Rest and Serve
Remove the baking dish from the oven and allow the creamy Brussels sprouts bake to rest for 5 minutes before serving. This brief resting time helps the sauce thicken slightly and settles the flavors. Garnish with fresh herbs like thyme or parsley to add a burst of color and freshness. Serve warm as a comforting side dish or a hearty vegetarian main. This recipe serves 5 to 6 people.