Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (2024)

Published . Last updated by Judy Purcell 33 Comments

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Broccoli-Cauliflower Gratin with a grownup Brie and cheddar cheese sauce is a side dish everyone loves to see on the table at dinnertime.

Leftovers create an amazing creamy soup too!

Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (1)

Easy Vegetable Side Dish

Broccoli and Cauliflower Gratin is an easy recipe to customize to your own taste. Roast or steam the vegetables and select any favorite cheese with good melting properties from the list below.

You’ll also find simple substitutes formaking it gluten-free with sweet rice flour while maintaining the integrity and quality of the dish.

How to Make a Great Cheese Sauce

  • Know your cheese. The selection of cheese is important for melting properties and flavor. We choose Brie to deliver a creamy, luxurious texture with extra-sharp cheddar and Parmesan to bring some punch.
    ⇒ Gruyere, Gouda, Fontina, Asiago, Provolone, Swiss, Taleggio, or Reblochon-Style cheese are all terrific choices for an amazing cheese sauce. Mozzarella can be used but is challenging to keep smooth and not stringy. Use only pure, real cheese, and never cheese foods.
  • Balance with acid and a touch of spice. An acid like Dijon paired with a tiny bit of spice from cayenne brings a welcome contrast to heavier foods and sauces.
  • Grate the cheese yourself. Pre-grated cheese will often have a coating of cellulose to keep it from sticking together in the package. This can inhibit a cohesive melting or leave the sauce slightly gritty. Grate the cheese from a block using a small hole grater—the more finely grated it is, the easier it will melt.
  • Go low and slow. Keep the heat low enough so the sauce forms large bubbles that pop slowly, like scattered raindrops. Stir constantly to keep everything smooth and silky.
  • Don’t overcook cheese sauce. The proteins in cheese will change the consistency if overheated. Bring the cheese to room temperature so it isn’t cold when adding it to the sauce. After the sauce has thickened, remove the sauce from heat before adding the cheese. The heat from the sauce will melt the cheese as you stir it in.

Just in case the phone rings or phone notifications distract(it happens), here’s an excellent resource forTIPS to save a broken sauce: Taste of Home, How to Save a Broken Sauce

Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (2)

Broccoli & Cauliflower Gratin Step by Step

  1. Roast vegetables at 400°F for 8-10 minutes.
  2. Make the cheese sauce by heating the butter in a saucepan until bubbly. Whisk in flour and cook on medium-low for 3-4 minutes. Reduce heat to low and whisk in milk, Dijon, and a pinch of cayenne; barely simmer on low about 5 minutes. Remove from heat and stir-in brie and cheddar cheese, continuing to stir until cheese is melted.
  3. Pour the sauce over the vegetables and sprinkle with Parmesan and bread crumbs. Spray crumbs lightly with cooking spray.
  4. Broil for 10 minutes until the cheese is bubbly and topping is lightly browned in spots.
Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (3)

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Gratin One Night, Soup for Lunch

My advice is to make more than you think you’ll need because it makes a fantastic cream soup for lunches. To make soup with leftovers, simply place leftovers in a food processor or use an immersion blender to puree until smooth.

Gently warm in a saucepan and thin with chicken broth or water to the desired consistency. Garnish with fresh chopped scallions or chives to serve.

Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (4)

More Vegetable Side Dish Recipes Your Family Will Love

  • Tuscan Roasted Broccoli
  • Roasted Vegetable Medley
  • Vegetable Tian
  • Grilled Asparagus with Cotija Cheese
  • Skillet Roasted Cauliflower Mash
  • Grilled Cabbage with Classic Caesar Dressing
  • Roasted Brussels Sprouts with Garlic Aioli
  • Roasted Asparagus with Caramelized Onions and Blue Cheese

Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (5)

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Broccoli-Cauliflower Gratin

Broccoli and cauliflower cradled in a Brie and cheddar cheese sauce and topped with panko bread crumbs for a creamy-crunchy vegetable side dish.

Prep Time10 minutes mins

Cook Time25 minutes mins

Total Time35 minutes mins

Servings: 6 Servings

Author: Judy Purcell

Ingredients

  • 16 ounces cauliflower , cut into bite-sized pieces slightly smaller than the broccoli
  • 16 ounces broccoli cut into bite-sized pieces
  • Sea salt and freshly ground pepper
  • 2 1/2 tablespoons butter
  • 2 tablespoons white whole wheat flour or sweet rice flour for gluten-free
  • 1 cup whole milk plus more to thin sauce as desired
  • 1/2 teaspoon Dijon mustard or 1 teaspoon lemon juice
  • Pinch cayenne pepper
  • 1 cup Brie cheese cut into small cubes
  • 3/4 cup grated extra-sharp cheddar cheese
  • 1/2 cup grated Parmesan cheese
  • 1/2 cup panko bread crumbs or gluten-free Panko crumbs
  • pinch ground white pepper
  • Olive oil cooking spray or duck fat spray
  • 9×13 Broiler-safe baking dish

Instructions

  • Season cauliflower and broccoli with salt and pepper. Roast in a 400°F oven for 8-10 minutes -OR- steam in a large skillet with a lid and 1/3 cup water over medium heat for 5-6 minutes until crisp-tender. (Add more water, if needed)

  • While the vegetables are cooking, melt 2 1/2 tablespoons butter In a medium saucepan. Use this melted butter to brush in the baking dish and then transfer vegetables to the baking pan in a single layer. Heat the broiler and position rack 8-10 inches from the heating element. Note: If you don’t have a broiler-safe dish, bake on convection bake at 400°F – this will brown the top more efficiently without overcooking the cheese sauce.

  • Return the remaining butter to the stove and heat until bubbly. Add 2 tablespoons flour and whisk over medium heat until bubbly. Continue to cook on medium-low for 3-4 minutes to incorporate the flour fully.

  • Reduce heat to low and whisk in 1 cup of milk, 1/2 teaspoon Dijon, and a pinch of cayenne; continue to stir and gently simmer on low about 5 minutes or until sauce thickens. Remove from heat and stir-in 1 cup cubed Brie and 3/4 cup cheddar cheese, continuing to stir until cheese is melted. Taste and season with salt and pepper.

  • Pour the sauce over the vegetables and sprinkle with Parmesan and bread crumbs. Spray crumbs lightly with cooking spray and broil for 10 minutes (depending on broiler – watch closely) until the cheese is bubbly and topping is lightly browned in spots.

Notes

Make Ahead TIP: Make ahead and cover for up to an hour. Dress with the bread crumbs and Parmesan just before putting in the oven.

Make it Gluten-Free: Substitute sweet rice flour for wheat flour and use gluten-free bread crumbs in place of the regular bread crumbs.

Cheese TIP: Brie has a soft white rind that is fine to add to the sauce, however, remove any dry edges as they do not melt as well. The soft rind may not completely melt, but that’s okay and not noticeable in the final dish.

Nutrition

Serving: 6g | Calories: 291kcal | Carbohydrates: 12g | Protein: 16g | Fat: 20g | Saturated Fat: 12g | Cholesterol: 61mg | Sodium: 508mg | Potassium: 402mg | Fiber: 3g | Sugar: 3g | Vitamin A: 2045IU | Vitamin C: 38.8mg | Calcium: 373mg | Iron: 2mg

Learn how to make this and all recipes even easier!Check out our Monthly Meal Prep System!

If you try this or any other recipe on the blog,please rate the recipeand let me know how it went for you in the comments below. It makes my day to hear from you!

Broccoli-Cauliflower Gratin recipe with Brie and Cheddar Cheese Sauce (2024)

FAQs

Why does my cauliflower cheese sauce split? ›

Cooking the cauliflower cheese at too high a temperature can sometimes cause the cheese to split, resulting in a slightly oily, grainy texture. A split sauce can also be avoided by removing the sauce from the heat before adding the cheese.

How long can you keep cauliflower cheese in the fridge? ›

How long can you keep Cauliflower Cheese in the fridge? Once you've put it out, ideally you should eat it within 4 hours. If you allow any leftovers to cool, make sure to refrigerate in a container with a lid and chill. You can keep leftovers of Cauliflower Cheese in the fridge for approximately 3 days or so.

Can you freeze cauliflower and broccoli cheese? ›

You can assemble this in advance and leave it in the fridge then just pop it in the oven when needed. If baking straight from the fridge, add an extra 5-10 minutes to the cooking time. Freezing instructions: Suitable for freezing once cooked. Defrost in the fridge or microwave and reheat until piping hot throughout.

Why does my cauliflower cheese sauce go watery? ›

Cauliflower cheese can go watery if the cauliflower is overcooked. Overcooked cauliflower releases water, which will seep into the rest of the dish. So even if your sauce was thick when it went in the oven, if its in there too long, the water from the cauliflower will cause it to go watery.

Why do you soak cauliflower before cooking? ›

If you're planning to roast the cauliflower whole or slice it into steaks, slice off the thick stem at the base. Drop the whole cauliflower head upside-down into cool, salted water. Let it soak for 10 to 15 minutes to remove dirt, residue and bugs.

Why is my cauliflower gratin watery? ›

Most recipes recommend blanching the cauliflower in boiling water for a few minutes for this initial stage, but it's important to pay close attention to this step. The watery problem happens when the cauliflower is either overcooked or not drained well enough after a quick blanching.

Why does cauliflower cheese upset my stomach? ›

The culprit behind the stomachaches is cauliflower's fiber content, which becomes most troublesome when you increase your fiber intake too rapidly without giving your body time to adjust. Stomachaches join other side effects of overloading on fiber.

How do I make sure my cheese sauce doesn't curdle? ›

It should be grated, not cubed. Grated cheese will melt in the sauce quickly and evenly. Cubes of cheese, on the other hand, will take longer to melt, so your sauce can overcook before the cheese has melted. It's that overcooking that can cause the sauce to curdle.

Can dogs eat cauliflower? ›

Yes, dogs can eat cauliflower in moderation, either raw or cooked. Cauliflower is a source of dietary fiber, vitamin K, and vitamin C for dogs. Some dogs may dislike the slightly bitter taste of cauliflower. Avoid cauliflower with seasonings or oils, as they can cause upset stomach.

Can I eat 2 day old cauliflower cheese? ›

Cooked cauliflower and cream cheese for sushi can generally last for about 2-3 days when stored properly in the refrigerator. As long as it has been handled and stored safely, it should be safe to consume within that timeframe.

Why can't I freeze cauliflower cheese? ›

It can be made up to 3 days in advance and stored in the fridge until ready to cook. It is possible to freeze cauliflower cheese but unfortunately the sauce can sometimes turn thin and sligtly watery on defrosting, so we prefer not to freeze the dish if at all possible.

Can a diabetic eat cheese sauce? ›

Cheese can be included as part of a healthy, balanced diet if you have diabetes. However, people with diabetes should opt for cheeses that are low in saturated fat and sodium while high in protein. If you have diabetes, combine higher-GI foods with cheese to help regulate blood sugar and prevent spiking.

Can I freeze fresh broccoli and cauliflower without blanching? ›

Like most vegetables, if frozen raw, the texture, taste, colour and nutritional value deteriorates, so make sure you blanch it to preserve these elements.

Is it better to freeze cauliflower raw or cooked? ›

We'd strongly recommend blanching cauliflower first, otherwise the high water content in the veg will turn it mushy if you freeze raw. To prevent deterioration of texture and nutritional value, it is best to partly cook (blanch) cauliflower florets before freezing. Wash the cauliflower and chop into equal size florets.

What is cheese sauce made of? ›

Classic cheese sauce begins with béchamel — a simple white sauce made of butter, flour, milk, and a few seasonings. Cheese is then added to the white sauce to create cheese sauce (called a Mornay sauce in French cuisine).

What is cauliflower made out of? ›

cauliflower, (Brassica oleracea, variety botrytis), highly modified form of cabbage in the mustard family (Brassicaceae), grown for its edible masses of partially developed flower structures and fleshy stalks.

What is the flavor profile of cauliflower? ›

Raw cauliflower has a subtly sweet, slightly nutty flavor. It is delicate and mild with a hint of pepperiness. Cauliflower's crisp texture yields a pleasing crunch when included in salads or used as a vessel for dips.

What is the white curd of cauliflower? ›

An annual plant that reproduces by seed, the cauliflower head is composed of a (generally) white inflorescence meristem. Cauliflower heads resemble those in broccoli, which differs in having flower buds as the edible portion. Typically, only the head is eaten; the edible white flesh is sometimes called "curd".

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