As I rummaged through the fridge searching for inspiration, a golden nugget caught my eye: a stash of Brussels sprouts begging to be transformed. This Creamy Brussels Sprouts Gratin with Mustard and Bacon is my answer to turning that neglected veggie into a stellar side dish. With its blend of tangy mustard and smoky bacon, it’s comfort food at its finest—sure to win over even the most skeptical eaters. Plus, this dish is impressively easy to whip up, making it perfect for both weeknight dinners and festive gatherings. Who can resist a bubbly gratin topped with a crunchy, golden crust? Stick around as I guide you through each step to create this delightful centerpiece for your table. What secrets do you think this creamy dish holds?

Why is This Gratin So Irresistible?

Creamy Delight: The béchamel sauce envelops the Brussels sprouts, creating a rich, decadent layer.

Smoky Goodness: Adding bacon brings a depth of flavor that elevates this dish from ordinary to extraordinary.

Crowd-Pleasing Appeal: Perfect for family dinners or holiday feasts, this gratin wows even the pickiest eaters.

Quick & Easy: With straightforward steps, you can have this impressive side dish ready in no time—ideal for busy weeknights!

Adaptable Ingredients: Feel free to switch up cheeses or make it vegetarian by omitting the bacon. Pair it with Winter Fruit Salad for a balanced meal!

Let this Brussels sprouts gratin be your new go-to comfort food.

Brussels Sprouts with Smoked Bacon Ingredients

For the Gratin

Brussels Sprouts – The star of the dish, trimmed and halved for even cooking.
Bacon – Adds a smoky flavor and richness, but can be substituted with turkey bacon for a lighter option.
Butter – Essential for sautéing veggies and enriching the sauce; olive oil is a great dairy-free alternative.
Onion – Enhances sweetness and depth; yellow onion is preferred for its well-rounded flavor.
Garlic – Boosts the overall flavor; freshly chopped is best, but garlic powder works in a pinch.
Flour – Thickens the béchamel sauce; use gluten-free flour for a gluten-sensitive diet.
Milk – Creates the creamy base; whole milk is recommended for richness, while plant-based milk can be used.
Nutmeg – Introduces a warm spice; feel free to omit if it’s not your favorite.
Grainy Mustard – Provides the dish with a tangy kick and unique texture; dijon mustard is a fine substitute.
Salt and Pepper – Essential for seasoning; adjust to your taste preferences.
Parmigiano Reggiano – For a flavorful topping; can be replaced with Pecorino Romano for a different twist.
Panko Bread Crumbs – Adds a crunchy topping; regular breadcrumbs can work, but panko gives a lighter texture.

Let these ingredients come together to create an unforgettable Brussels Sprouts with Smoked Bacon dish that your family will adore!

Step‑by‑Step Instructions for Creamy Brussels Sprouts Gratin with Mustard and Bacon

Step 1: Blanch Brussels Sprouts
Start by bringing a large pot of salted water to a boil. Carefully add the trimmed and halved Brussels sprouts, cooking them for about 5 minutes until they are bright green and just tender. Drain the sprouts and rinse them under cold water to stop the cooking process. Set aside, as they will soon be enveloped in a creamy sauce.

Step 2: Cook Bacon
In a large skillet, add the diced bacon and cook over medium heat for 7-10 minutes, stirring occasionally, until crispy and golden brown. Using a slotted spoon, remove the bacon and place it on a paper towel-lined plate to cool, leaving about 1 tablespoon of rendered bacon fat in the pan to enhance the dish’s flavor.

Step 3: Sauté Onion & Garlic
In the same skillet with the bacon fat, melt 2 tablespoons of butter over medium heat. Add the chopped onions and sauté for 5-7 minutes until they become translucent and tender. Stir in the minced garlic, cooking for an additional minute until fragrant, ensuring no browning occurs, as you want a sweet, delicate flavor base for the Brussels sprouts gratin.

Step 4: Make Sauce
Sprinkle the flour into the pan with the onion mixture, stirring constantly for about 2-3 minutes until it’s lightly golden and bubbly. Gradually whisk in 2 cups of milk, followed by the nutmeg, grainy mustard, salt, and pepper. Cook until the sauce thickens, about 5 minutes, and then stir in half of the Parmigiano Reggiano until melted and smooth, creating a luscious béchamel.

Step 5: Combine
Add the blanched Brussels sprouts and crispy bacon into the creamy sauce, tossing gently to coat every sprout evenly. Transfer this delightful mixture into a greased 9×13 baking dish, ensuring the sprouts are nicely layered for even baking. This colorful medley will soon transform into a comfort food sensation.

Step 6: Prepare Topping
In a small bowl, mix the remaining Parmigiano Reggiano with panko bread crumbs. Sprinkle this golden topping evenly over the Brussels sprouts gratin, ensuring every corner is covered. This topping will create a beautiful crunchy crust that contrasts with the creamy filling, making this dish even more irresistible.

Step 7: Bake
Preheat your oven to 350°F (180°C). Place the baking dish in the oven and bake for 15-20 minutes, or until the gratin is bubbly and the top is golden brown. Keep an eye on it to avoid over-browning; if necessary, broil for an additional 1-2 minutes for that perfect crunch. Get ready for the comforting aromas to fill your kitchen!

What to Serve with Creamy Brussels Sprouts Gratin with Mustard and Bacon

Imagine the comforting aroma of your kitchen filled with rich, cheesy goodness as you prepare a delightful meal that’s perfect for sharing.

Roasted Chicken: This juicy, herb-seasoned roast brings a classic pairing that complements the creamy richness of the gratin beautifully.
Garlic Mashed Potatoes: Creamy and buttery, these potatoes enhance the comfort factor while providing a smooth texture to balance the crunchy gratin.
Honey-Glazed Carrots: Sweet and vibrant, these tender carrots add a fresh pop of color and flavor to your plate, making every bite more delightful.
Savory Stuffed Mushrooms: Earthy and stuffed with herbs and cheese, these bite-sized treats add an elegant touch to your meal, echoing the gratin’s creamy profile.
Lemon Roasted Asparagus: The bright acidity of lemon-roasted asparagus cuts through the richness of the gratin, offering a refreshing balance to your plate.
Bubbly Chardonnay: This white wine’s crisp acidity pairs well, enhancing the flavors of both the gratin and any accompanying proteins for a memorable dining experience.
Apple Crisp: For dessert, this warm and spiced treat is a delightful ending that plays off the savory elements of the gratin while adding a sweet twist.
Mixed Green Salad: Tossed with a zesty vinaigrette, the refreshing crunch of a salad helps cleanse the palate between bites of the creamy gratin.
Cold Brew Iced Tea: A lightly sweetened tea serves as a refreshing accompaniment, providing a cooling balance to the meal’s warmth and richness.

Make Ahead Options

These Creamy Brussels Sprouts Gratin with Mustard and Bacon are perfect for busy weeknights! You can prepare the entire dish, including the béchamel sauce, up to 24 hours in advance. Simply blanch the Brussels sprouts and combine them with the sauce and bacon, then transfer to a greased baking dish. Cover and refrigerate overnight to maintain freshness. When you’re ready to bake, remove it from the fridge and let it sit at room temperature for about 30 minutes before sprinkling the panko topping and baking. This ensures that the gratin is just as delicious and perfectly bubbling when served, saving you time while still delivering that comforting home-cooked goodness!

How to Store and Freeze Brussels Sprouts Gratin

Fridge: Store any leftovers in an airtight container for up to 3 days. Reheat in the oven to maintain the gratin’s creamy texture and crunchy topping.

Freezer: For longer storage, freeze the unbaked gratin by covering it tightly with plastic wrap and aluminum foil. It can last for up to 2 months.

Reheating: When ready to enjoy, thaw overnight in the fridge, then bake at 350°F (180°C) until heated through, about 25-30 minutes.

Serving Tips: This Brussels sprouts gratin can be served straight from the fridge or warmed; it pairs excellently with diverse main courses.

Brussels Sprouts with Smoked Bacon Variations

Feel free to unleash your creativity and customize this delectable gratin to suit your taste buds.

Vegetarian Delight: Replace bacon with smoked tempeh or mushrooms for a hearty vegetarian option. The creamy sauce still shines!
Dairy-Free Option: Use almond or oat milk with dairy-free cheese alternatives to enjoy a creamy texture without the dairy.
Cheese Swap: Experiment with different cheeses like Gruyère or sharp cheddar for a twist on the classic flavor profile. Each cheese brings its unique warmth!
Spicy Kick: Add a pinch of red pepper flakes or a dash of hot sauce while making the sauce for a delightful hint of heat.
Herb Infusion: Stir in fresh herbs like thyme or rosemary into the sauce for an aromatic boost that will elevate each bite.
Crunchy Topping: Combine crushed walnuts or pecans with the panko for added texture and nutty flavor. This little added crunch is hard to resist!
Flavor Booster: Mix in caramelized shallots alongside the onions to deepen the flavor palate and provide a sweet undertone.
Mustard Variations: Swap grainy mustard for Dijon or honey mustard for a different taste dimension, bringing new layers to the dish.

No matter how you choose to customize, this Brussels sprouts gratin paired perfectly with a refreshing Fruit Salad Cider is bound to be a crowd-pleaser!

Expert Tips for Brussels Sprouts with Smoked Bacon

Perfectly Blanched: Blanch Brussels sprouts until just tender to prevent mushiness. They will finish cooking beautifully as they bake in the gratin.
Roux Care: When making the roux, ensure it stays a light golden brown. Over-browning can lead to a bitter flavor in the béchamel sauce.
Cheese Options: Feel free to experiment with different cheese varieties. Gruyère or cheddar can add unique flavors that complement the Brussels sprouts perfectly.
Topping Crunch: For an extra crunchy topping, broil for the last 1-2 minutes. Watch carefully to avoid burning—golden brown is the goal!
Make-Ahead Friendly: Prepare the gratin ahead of time, store it in the fridge, then bake just before serving. This is perfect for stress-free holiday meals.
Vegetarian Twist: Swap the bacon with smoked tempeh or leave it out entirely for a delicious vegetarian dish. The creamy sauce still shines!

Brussels Sprouts with Smoked Bacon Recipe FAQs

How do I select the best Brussels sprouts?
Absolutely! When choosing Brussels sprouts, look for ones that are firm, bright green, and tightly packed. Avoid any that have yellowing leaves or dark spots all over, as they may be past their prime. Smaller Brussels sprouts tend to be sweeter and more tender; I recommend those for the best flavor in your gratin.

How should I store leftovers of the Brussels sprouts gratin?
To keep your gratin fresh, you can store any leftovers in an airtight container in the refrigerator for up to 3 days. It’s best to reheat it in the oven at 350°F (180°C) for about 15-20 minutes to restore the creamy texture and crunchy topping. Microwaving is an option, but it may not keep that lovely crust intact.

Can I freeze Brussels sprouts gratin for later use?
Absolutely! For freezing, prepare the gratin but do not bake it. Cover the unbaked dish tightly with plastic wrap and aluminum foil. It can be stored in the freezer for up to 2 months. When you’re ready to enjoy it, thaw overnight in the refrigerator, then bake at 350°F (180°C) for about 25-30 minutes until heated through. This way, it stays as irresistible as fresh!

What if my béchamel sauce is too thick or too thin?
Very good question! If your béchamel sauce becomes too thick, you can simply whisk in a bit more milk until it reaches the desired consistency. Conversely, if it’s too thin, continue cooking it on low heat, stirring frequently, until it thickens up. Aim for a silky texture that coats the back of a spoon; this will create the perfect creamy base for your Brussels sprouts.

Is this recipe suitable for a gluten-free diet?
Yes! You can easily make this Brussels sprouts gratin gluten-free by substituting regular flour with a gluten-free alternative, such as rice flour or almond flour. Just be sure to keep an eye on the consistency of your béchamel sauce, as different flours may absorb liquids differently. It’s a delicious option that everyone can enjoy!

Can my pets have Brussels sprouts?
While Brussels sprouts are safe for pets in moderation and offer beneficial nutrients, ensure they are cooked and free of seasonings like garlic and onion, which can be harmful to pets. Always consult your veterinarian if you’re unsure about specific dietary additions for your furry friends!