Easy Brussels Sprouts Au Gratin Recipe to Try

If you’re looking for a cozy, delicious side dish that effortlessly elevates your meal, this creamy, cheesy Brussels Sprouts Au Gratin recipe is exactly what you need. Packed with tender Brussels sprouts enveloped in a velvety cheese sauce, this dish brings comfort and flavor in every bite. Whether you’re a Brussels sprouts fan or just curious to try something new, Brussels Sprouts Au Gratin offers a simple way to enjoy these little green gems like never before.

Why You’ll Love This Recipe

• Comfort food classic: The rich cheese sauce creates a warm, inviting dish that’s perfect for cozy dinners.
• Quick and easy: With straightforward ingredients and simple steps, you can have it ready in under 45 minutes.
• Versatile side dish: Ideal alongside roasts, poultry, or even a hearty vegetarian main course.
• Brussels sprouts made irresistible: The creamy au gratin style transforms the often-misunderstood veggie into a crowd-pleaser.
• Great for gatherings: This dish travels well and can easily serve a holiday dinner or casual family meal.

Ingredients You’ll Need

These simple, staple ingredients come together to form a deliciously creamy and cheesy Brussels Sprouts Au Gratin that you’ll want to make again and again. Each component plays a key role in delivering the perfect balance of texture, flavor, and color.

• Brussels sprouts: Fresh and trimmed, they provide the hearty vegetable base with a slight nutty flavor.
• Butter: Adds richness and helps create a smooth sauce.
• All-purpose flour: Used to thicken the cheese sauce perfectly.
• Milk: Creates the creamy consistency that coats every sprout evenly.
• Gruyere cheese: Melts beautifully with a nutty, slightly sweet flavor essential for au gratin.
• Parmesan cheese: Adds a sharp, salty finish to the cheese mix and topping.
• Garlic powder: Enhances the savory depth with a subtle kick.
• Salt and black pepper: Essential seasonings to bring out the natural flavors.
• Breadcrumbs: For a crispy, golden topping that adds textural contrast.

Variations for Brussels Sprouts Au Gratin

Don’t hesitate to customize this recipe to fit your tastes or dietary needs. It’s wonderfully adaptable and easy to make your own by swapping ingredients or adding a personal twist.

• Cheese swap: Try cheddar, mozzarella, or fontina if you prefer different flavors or a melty texture.
• Gluten-free: Use gluten-free flour and breadcrumbs to make this dish allergy-friendly.
• Extra veggies: Add caramelized onions or sautéed mushrooms for depth and complexity.
• Spice it up: Include a pinch of cayenne pepper or smoked paprika to add warmth and a bit of heat.
• Herbs: Fresh thyme or rosemary can be stirred into the sauce or sprinkled on top for an aromatic touch.

How to Make Brussels Sprouts Au Gratin

Step 1: Prepare the Brussels sprouts

Trim and halve fresh Brussels sprouts, then blanch them in boiling water for 3-4 minutes until they turn bright green and slightly tender. Drain and set aside so they’re ready to be coated in the sauce.

Step 2: Make the cheese sauce

Melt butter in a saucepan over medium heat, then whisk in flour to create a roux. Slowly add milk while stirring constantly, cooking until the sauce thickens. Stir in most of the Gruyere and Parmesan cheese along with garlic powder, salt, and pepper. Keep stirring until the cheese melts into a smooth, creamy sauce.

Step 3: Combine Brussels sprouts with cheese sauce

Pour the cheese sauce over the blanched Brussels sprouts, making sure each sprout is well coated. Transfer the mixture to a buttered baking dish, spreading evenly.

Step 4: Add breadcrumb topping

Sprinkle the top with the remaining cheeses and breadcrumbs; this creates the classic gratin crust. Dot with a little extra butter for an irresistible golden finish.

Step 5: Bake until bubbly and golden

Place the dish in a preheated oven at 375°F (190°C) and bake for 20-25 minutes, or until the top is nicely browned and bubbling. Let it cool slightly before serving.

Pro Tips for Making Brussels Sprouts Au Gratin

• Don’t skip blanching: It helps reduce bitterness and preserves the bright green color.
• Use good-quality cheese: Fresh, high-quality Gruyere and Parmesan make the sauce flavorful and smooth.
• Season as you go: Taste the sauce before baking and adjust salt and pepper for the perfect balance.
• Crispy topping: Lightly toast breadcrumbs beforehand for extra crunch if you like.
• Rest before serving: Allow the dish to cool for 5-10 minutes to let the sauce thicken fully.

How to Serve Brussels Sprouts Au Gratin

Garnishes

Sprinkle freshly chopped parsley or a handful of sliced green onions on top to add brightness and a pop of color that contrasts nicely with the creamy texture.

Side Dishes

Brussels Sprouts Au Gratin pairs beautifully with roasted chicken, pork tenderloin, or a juicy steak, plus mashed potatoes or wild rice to complete a hearty dinner.

Creative Ways to Present

For a festive touch, serve the au gratin in individual ramekins or mini cast-iron skillets. This looks impressive yet remains effortlessly cozy for any occasion.

Make Ahead and Storage

Storing Leftovers

Place any leftovers in an airtight container and refrigerate for up to 3 days. The flavors meld beautifully, and it reheats well.

Freezing

Brussels Sprouts Au Gratin freezes well when cooled completely. Store in a freezer-safe container for up to 2 months. Thaw overnight in the fridge before reheating.

Reheating

Reheat leftovers in the oven at 350°F (175°C) for 15-20 minutes to restore the creamy texture and crisp topping. Avoid microwaving to keep the crust crunchy.

FAQs

Can I use frozen Brussels sprouts for this recipe?

Yes, but thaw and drain them well before using. Fresh sprouts yield the best texture and flavor for Brussels Sprouts Au Gratin.

What cheese works best besides Gruyere?

Cheddar, mozzarella, fontina, or a blend of these cheeses make excellent substitutes to give you a slightly different but equally delicious au gratin flavor.

How can I make this recipe dairy-free?

Use plant-based milks like almond or oat milk, dairy-free butter, and vegan cheese alternatives to create a creamy Brussels Sprouts Au Gratin that suits dairy-free diets.

Is this dish suitable for meal prep?

Absolutely! Prepare it a day ahead and store it in the fridge. Reheat in the oven before serving to enjoy it fresh and bubbly.

Can I add bacon or pancetta?

Yes! Adding cooked bacon or pancetta bits brings a smoky, savory contrast that works wonderfully in this cheesy side dish.

Final Thoughts

Brussels Sprouts Au Gratin is a wonderful combination of comfort, flavor, and simplicity that anyone can master. Give it a try for your next meal and watch this creamy, cheesy side become a fast favorite with family and friends.

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