Broccoli and Blue Cheese Gratin is a culinary masterpiece, transforming humble broccoli into an irresistibly rich and comforting side dish perfect for any occasion, especially holiday gatherings like Thanksgiving. This beloved casserole features tender broccoli florets lovingly embraced by a creamy, piquant blue cheese sauce, all crowned with a golden, crunchy topping of toasted breadcrumbs. It’s an elegant yet surprisingly simple creation that promises to be a showstopper at your dinner table, delivering a harmonious blend of earthy vegetables, sharp cheese, and satisfying texture.
TL;DR (Quick-Answer Box)
- What it is: A luxuriously creamy and comforting vegetable gratin, showcasing perfectly tender broccoli florets enrobed in a rich milk-based sauce. The distinct flavor comes from pungent blue cheese, balanced with a subtle warmth from a pinch of cayenne pepper.
- Why you’ll love it: This gratin elevates a basic vegetable to a decadent, holiday-worthy side. It offers a sophisticated flavor profile with its sharp, tangy blue cheese kick and delightful textural contrast from the crispy topping, making it an irresistible addition to any meal.
- How to make it: The process involves blanching broccoli until just tender, crafting a classic Béchamel sauce infused with blue cheese and cayenne, and then topping the assembled casserole with golden, buttery toasted breadcrumbs before baking until bubbly and golden brown.
Few dishes offer the comforting embrace and rich indulgence of a perfectly prepared gratin. And when it comes to transforming simple, wholesome broccoli into an extraordinary culinary experience, a generous blanket of blue cheese sauce with a hint of heat from cayenne pepper is truly the secret. This isn’t just a vegetable side; it’s a statement. The depth of flavor from the pungent blue cheese harmonizes beautifully with the verdant earthiness of the broccoli, while the crunchy topping provides an essential textural counterpoint. What makes this recipe even more appealing is its flexibility – with a few clever make-ahead steps, you can prepare much of it in advance, leaving you more time to enjoy your guests or relax before a busy meal.
The journey to this delectable dish begins with steaming the broccoli until it reaches optimal tenderness, ensuring it retains its vibrant color and slight crispness. This prepared broccoli is then enrobed in a velvety cheese sauce, a classic Béchamel transformed by the assertive character of blue cheese. Finally, a golden layer of buttery breadcrumbs is scattered generously over the top, creating a magnificent crust during baking. This thoughtful layering of textures and flavors ensures every spoonful is a delight. Being able to steam the broccoli and prepare the sauce ahead of time is a game-changer, allowing you to simply assemble and bake the gratin just before serving, making it an ideal choice for holiday menus or weeknight meals alike.
Why Our Testers Loved This
Our recipe testers unanimously praised this outstanding broccoli au gratin, noting its incredible balance of flavors and textures. The combination of tender broccoli smothered in a rich blue cheese sauce and topped with crispy bread crumbs created an addictive quality that had everyone reaching for more. Testers particularly highlighted its status as an “easy side dish”, making it accessible even for novice cooks, while also appreciating how the distinctive tang of blue cheese truly elevates the humble broccoli, transforming it into a sophisticated and memorable accompaniment to any main course. The subtle warmth from the cayenne was also a frequently mentioned delightful surprise.
Notes on Ingredients: Crafting the Perfect Gratin
- Broccoli: For this recipe, aim for medium-sized heads, roughly 14 ounces (400 g) each. Fresh, firm heads with tightly packed florets and vibrant green color are ideal. Avoid any with yellowing florets or soft spots, as these indicate older produce. While fresh is always best, convenience can be king; pre-chopped broccoli or even frozen broccoli florets can be used in a pinch, though they might require slight adjustments to steaming times.
- Unsalted Butter: Butter forms the base of both the breadcrumb topping and the creamy Béchamel sauce. Using unsalted butter gives you precise control over the overall seasoning of the dish. If you only have salted butter on hand, remember to reduce the added salt in the recipe to about 1/4 teaspoon to prevent the gratin from becoming overly salty.
- Bread Crumbs: Fresh bread crumbs provide a light, crisp texture that beautifully complements the creamy interior. To make fresh bread crumbs, simply pulse day-old bread in a food processor until coarse crumbs form. For an extra-crunchy topping, consider substituting panko breadcrumbs. Panko, a Japanese-style breadcrumb, is renowned for its airy, flaky texture that crisps up exceptionally well, adding another layer of delightful crunch.
- Blue Cheese: The star of the sauce, blue cheese brings a distinctive tangy and savory punch. A mild, creamy blue cheese like Bleu d’Auvergne, Gorgonzola Dolce, or even a milder Danish Blue works exceptionally well here, melting smoothly into the sauce without overpowering the other flavors. If you prefer a stronger, more assertive blue cheese flavor, varieties like Roquefort or a more mature Stilton can be used, but start with a smaller amount and taste as you go to ensure it doesn’t dominate the dish. Crumble the cheese finely for even distribution and quicker melting.
- Whole Milk: The richness of whole milk is crucial for creating a luscious, smooth Béchamel sauce. While you could technically use lower-fat milk, it might result in a thinner sauce with a less luxurious mouthfeel.
- Cayenne Pepper: This unassuming spice adds a subtle, warming heat that beautifully cuts through the richness of the cheese and rounds out the flavor profile. Start with a pinch and adjust to your preference; you can always add a little more if you desire a spicier kick.
Step-by-Step Instructions: Creating Your Masterpiece
- Prepare Your Baking Dish: Begin by preheating your oven to 350°F (176°C) and generously buttering your chosen gratin or baking dish. This prevents sticking and contributes to a beautiful golden crust.
- Steam the Broccoli to Perfection: Trim the thick stalks from the broccoli heads, then cut each head in half lengthwise to ensure even cooking. Steam the broccoli until it’s just tender enough to be easily pierced with a fork but still retains a slight bite and vibrant green color. Immediately drain and rinse it under cold water to halt the cooking process and preserve its color. Once cooled, coarsely chop the broccoli and set it aside in a bowl.
- Toast the Bread Crumbs: In a skillet over medium heat, melt a small amount of butter. Add your fresh or panko bread crumbs and cook, stirring frequently, until they turn a beautiful golden brown and become wonderfully crisp. This takes about 3 to 5 minutes. Transfer them to a plate and set aside to cool.
- Craft the Silky Blue Cheese Sauce: In a saucepan over medium heat, melt the specified amount of butter. Once melted, remove the pan from the heat and whisk in the flour to create a smooth roux. Return the pan to low heat and gradually whisk in the milk, starting with half a cup, until fully incorporated and smooth. Continue to simmer, stirring occasionally, until the sauce thickens. Season with salt, black pepper, and a pinch of cayenne. Whisk in the remaining milk, simmering until the sauce is thick enough to coat the back of a spoon. Finally, stir in the crumbled blue cheese just until it’s melted and fully integrated, creating a luxurious, pungent sauce. Remove from heat.
- Assemble and Bake Your Gratin: Pour the warm blue cheese sauce over the chopped broccoli in the bowl and gently toss to ensure every floret is coated. Spoon this mixture into your prepared baking dish, spreading it evenly. Generously top with the toasted breadcrumbs. For extra richness and browning, you can dot the top with a few small bits of the remaining butter. Bake in the preheated oven until the edges are bubbly, and the topping is golden brown and irresistible, approximately 20 minutes. Serve hot and enjoy!
Common Questions About Broccoli and Blue Cheese Gratin
A gratin (pronounced grah-TAN) is a French culinary technique where an ingredient is topped with a browned crust, often made of breadcrumbs, cheese, or both, and baked. The term “gratin” itself refers to this crust. Typically, it involves a vegetable or pasta dish baked with a creamy sauce and often finished under a broiler to achieve that characteristic golden-brown, crispy top. While potato gratin is perhaps the most well-known, gratins are incredibly versatile and can be made with almost any vegetable, like this delightful broccoli version, or other examples such as butternut squash gratin, Belgian endive gratin, or zucchini gratin with fresh herbs and goat cheese. The beauty of a gratin lies in its comforting texture and often cheesy, savory flavors.
This gratin is excellent for make-ahead preparation, saving you valuable time, especially for entertaining. You can complete several steps up to 24 hours before baking: steam the broccoli, rinse it under cold water, drain thoroughly, and chop it; toast the bread crumbs until golden and let them cool completely; and prepare the blue cheese sauce. Store the cooked broccoli and the sauce separately in airtight containers in the refrigerator. Keep the cooled, toasted bread crumbs in a sealed bag or container at room temperature to maintain their crispness. When you’re ready to bake, simply assemble the gratin by combining the broccoli and sauce, transferring it to your baking dish, topping with breadcrumbs, and popping it into the oven. This ensures maximum freshness and convenience.
Steaming the broccoli before baking serves a couple of important purposes. Firstly, it helps to cook the broccoli partially, ensuring that it becomes perfectly tender and not undercooked after the relatively shorter baking time in the oven. Secondly, and perhaps more importantly, quickly steaming and then rinsing the broccoli under cold water helps to lock in its vibrant green color, preventing it from turning dull or mushy during the baking process. This technique ensures your gratin is as visually appealing as it is delicious, with bright green broccoli contrasting beautifully with the creamy sauce and golden topping.
This rich and flavorful broccoli and blue cheese gratin pairs wonderfully with a variety of main courses. Its creamy, savory profile makes it an excellent accompaniment to roasted or braised meats. Consider serving it alongside succulent maple bourbon braised short ribs, a perfectly cooked roast pork tenderloin with paprika, a classic roast chicken, or as a decadent vegetable side for your Thanksgiving turkey. To balance the richness of the gratin, a crisp, fresh salad would be an ideal counterpoint. A vibrant apple, fennel, and orange salad, with its bright, acidic notes, would round out the meal beautifully.
Pro Tips & Troubleshooting for the Best Gratin
- Save Time with Pre-Chopped Broccoli: If you’re short on time, opting for pre-chopped broccoli florets can significantly speed up prep. Generally, two regular-sized bags or one large bulk-sized bag (like those from Costco) are roughly equivalent to the three chopped heads of broccoli called for in this recipe. Just ensure they are fresh and vibrant.
- Achieving the Perfect Sauce Consistency: The key to a great gratin is a smooth, velvety sauce. When making the Béchamel, ensure you whisk continuously, especially when adding the milk, to prevent lumps. If your sauce appears too thick, you can thin it with a splash more milk; if it’s too thin, simmer gently for a few more minutes, stirring, to allow it to reduce and thicken.
- Ensure Even Browning: For that irresistible golden crust, spread your breadcrumbs evenly over the gratin. If your gratin isn’t browning sufficiently by the end of the baking time, you can carefully place it under a broiler for 1-2 minutes. Watch it very closely, as breadcrumbs can burn quickly!
- Storage and Reheating Leftovers: Leftovers of this delicious gratin can be stored in a sealed container in the refrigerator for up to 4 days. To reheat, cover the dish with foil and warm in a moderate oven (around 300°F/150°C) until heated through, then remove the foil for the last few minutes to re-crisp the topping.
- Freezing is Not Recommended: Due to the creamy sauce, we do not recommend freezing this broccoli gratin. Freezing and thawing can cause the sauce to separate and become watery, affecting the texture and overall quality of the dish.
- Enhancing Flavor: For an extra layer of flavor, consider adding a pinch of freshly grated nutmeg to the Béchamel sauce alongside the cayenne. Nutmeg is a classic complement to cheese sauces and will deepen the complexity of the gratin.
More Delectable Broccoli Recipes to Explore
Broccoli with Peanut Sauce
20 mins
Roasted Broccoli With Walnuts, Raisins, and Ricotta Salata
45 mins
Roasted Broccoli with Soy Sauce
40 mins
Italian Sausage and Broccoli Rabe
45 mins
Share Your Experience
We love hearing from you! If you make this recipe, or any dish from Leite’s Culinaria, please consider leaving a review, a star rating, and your best photo in the comments below. Your feedback inspires us all to keep cooking!–David
This was excellent. I scaled it to 1/3 and it was perfect for two people as a side dish to short ribs. I will make this again!
Lynn
Broccoli and Blue Cheese Gratin
David Leite
Ingredients
- 3 heads broccoli (about 14 oz / 400g each)
- 3 1/2 tablespoons unsalted butter, plus more for the baking dish
- 1/4 cup plus 2 tablespoons fresh bread crumbs (or panko for extra crunch)
- 2 tablespoons all-purpose (plain) flour
- 1 1/2 cups whole milk
- 1/2 teaspoon fine sea salt (adjust if using salted butter)
- 1/2 teaspoon freshly ground black pepper
- Pinch cayenne pepper (or more, to taste)
- 1 1/2 to 2 ounces blue cheese, preferably a mild and creamy variety like Bleu d’Auvergne or Gorgonzola, crumbled
Instructions
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Preheat your oven to 350°F (176°C). Lightly butter a gratin or an 8- to 9-inch (20- to 23-cm) baking dish.
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Prepare the broccoli: Trim and discard the thick, woody stalks from the broccoli heads. Cut each head in half lengthwise.
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Steam the broccoli: Place the broccoli florets in a steamer rack set over boiling water. Cover and steam until the broccoli is easily pierced with a fork but still retains a slight crispness, typically 7 to 12 minutes, depending on the size of the florets. Drain immediately and rinse the broccoli under cold running water to stop the cooking process and preserve its vibrant green color. Coarsely chop the steamed broccoli and transfer it to a large bowl.
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Toast the bread crumbs: Meanwhile, in a skillet set over medium heat, melt 1/2 to 1 tablespoon of the unsalted butter. Add the bread crumbs and cook, stirring frequently, until they are golden brown and crisp, about 3 to 5 minutes. Remove the toasted bread crumbs from the skillet, transfer them to a plate, and set aside.
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Make the blue cheese sauce base: In a medium saucepan over medium-high heat, melt 2 tablespoons of the unsalted butter. Once the butter is melted and bubbly, remove the pan from the heat and vigorously whisk in the all-purpose flour until a smooth paste (roux) forms.
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Build the Béchamel: Return the saucepan to low heat. Slowly pour in 1/2 cup of the whole milk, whisking constantly to incorporate it smoothly into the roux. Reduce the heat to low and continue to simmer, stirring occasionally, until the sauce begins to thicken, about 5 to 7 minutes.
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Season and thicken: Slowly whisk in another 1/2 cup of milk. Add the fine sea salt, freshly ground black pepper, and a pinch of cayenne pepper. Continue to simmer, stirring occasionally, until the mixture has thickened again, which should take approximately 5 minutes.
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Add the blue cheese: Whisk in the remaining 1/2 cup milk and continue to simmer until the sauce is thick enough to generously coat the back of a spoon, about 5 minutes longer. Remove the pan from the heat. Stir in the crumbled blue cheese and cook, stirring gently, just until the cheese is melted and fully incorporated into the sauce, about 2 minutes.
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Assemble the gratin: Pour the prepared blue cheese sauce over the chopped broccoli in the bowl. Gently turn the broccoli to ensure it is thoroughly coated with the creamy sauce. Spoon the mixture evenly into the prepared gratin dish, smoothing the surface with the back of a spoon. Generously top with the buttered, toasted bread crumbs. For an extra touch of richness and browning, cut the remaining unsalted butter into tiny bits and dot them over the breadcrumb topping.
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Bake and serve: Bake the gratin in the preheated oven for approximately 20 minutes, or until the sauce is bubbling around the edges and the breadcrumb topping is beautifully golden brown and crisp. Serve immediately while hot.
Notes
- Make It in Advance: To simplify your meal preparation, you can complete the initial steps up to one day ahead. Steam the broccoli, toast the bread crumbs, and prepare the blue cheese sauce. Store the cooked broccoli and the sauce in separate, sealed containers in the refrigerator. Keep the cooled, toasted bread crumbs in an airtight container at room temperature. Assemble the gratin just before you are ready to bake it.
- Time-Saving Tip: Opt for convenience by purchasing pre-cut broccoli florets. Typically, two regular-sized bags or one large bulk-sized bag will be equivalent to the three chopped heads of broccoli specified in the recipe.
- Storage Guidelines: Any leftover gratin can be stored in a sealed container in the refrigerator for up to 4 days. When reheating, cover the dish with foil and warm in a moderate oven until heated through. We do not recommend freezing this broccoli gratin, as the creamy sauce may separate upon thawing.
Adapted From
Williams-Sonoma Entertaining with the Seasons
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Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
What Our Recipe Testers Thought
Natalie Reebel
This broccoli gratin with blue cheese was absolutely delightful. You can truly never go wrong when combining tender broccoli with a rich, creamy cheese sauce. The blue cheese added a fantastic depth of flavor without being overwhelming, striking a perfect balance. The sauce itself was wonderfully creamy, with just a hint of subtle warmth from the cayenne. And those crispy bread crumbs on top? A truly fantastic touch that added essential texture. This dish is excellent in every way.
Tracey G.
This broccoli and blue cheese gratin served as a relatively easy and incredibly satisfying side dish for our family dinner. What I particularly loved was the vibrant tang from the blue cheese, which provided a wonderful counterpoint to the creamy sauce, and the satisfying crunch from the toasted bread crumbs. These elements combined to offer more interesting tastes and textures than some other vegetable gratins that can sometimes become too rich or monotonous. It’s a well-balanced and genuinely enjoyable dish.
Alexander Cowan
Last summer, some truly amazing friends brought us gifts for housesitting, including glorious La Quercia prosciutto and an entire wheel of Maytag blue cheese. We’d been slowly savoring the blue cheese when this broccoli au gratin recipe appeared, and all I can say is, it was an absolute killer! The dish emerged from the oven perfectly creamy, wonderfully pungent, and the broccoli was super tender. I do have one small note regarding the recipe’s instructions: defining a “head of broccoli” can be tricky. Broccoli at farmers’ markets often varies greatly in size compared to grocery store varieties. I opted to use two bags of Trader Joe’s florets, which, in my humble opinion, is a brilliant shortcut that saves a significant amount of time and is highly recommended. Aside from that minor clarification, the recipe works beautifully as written. We literally devoured the entire pan for dinner; it was that good.
Kristin Cole
I had never considered combining broccoli with blue cheese before, but this duo works incredibly well together! The classic Béchamel sauce beautifully rounds out the piquant, sharp flavors of the Gorgonzola, yet we’re still left with that lovely spicy finish from the cayenne pepper, which adds a fantastic kick. The recipe executed perfectly, though I did wonder if the sauce could be made in fewer steps by adding all the milk at once, perhaps. Also, as a huge fan of the broiler, I would definitely recommend finishing this gratin under a direct flame for a few minutes to achieve an even more wonderful crispness on the topping. Overall, this is a hearty yet robustly flavorful vegetable side dish that truly impressed!