Looking for a side dish that combines comfort with a touch of elegance? This creamy broccoli and cauliflower gratin is your answer. It’s the perfect balance of tender vegetables and a rich, cheesy sauce that’s elevated with a zesty mustard crust. Whether you’re hosting a dinner party or just enjoying a family meal, this dish is sure to impress.
This gratin is not just about looks; the taste is a delightful harmony of creamy, cheesy goodness punctuated with a subtle tang from the mustard. The crispy top adds a satisfying crunch, making each bite a balanced experience.
Deliciously Decadent Broccoli and Cauliflower Gratin

This creamy gratin features fresh broccoli and cauliflower smothered in a velvety cheese sauce, topped with a crunchy mustard-infused breadcrumb crust. It’s rich, satisfying, and absolutely irresistible.
Ingredients
- 2 cups broccoli florets
- 2 cups cauliflower florets
- 1 cup heavy cream
- 1 cup shredded cheddar cheese
- 1/2 cup grated Parmesan cheese
- 1 tablespoon Dijon mustard
- 1/2 teaspoon garlic powder
- 1/4 teaspoon black pepper
- 1 cup breadcrumbs
- 2 tablespoons melted butter
- Salt to taste
Instructions
- Preheat the Oven: Preheat your oven to 375°F (190°C).
- Prepare the Vegetables: Steam the broccoli and cauliflower florets until just tender, about 5 minutes. Drain and set aside.
- Make the Cheese Sauce: In a saucepan, heat the heavy cream over medium heat. Stir in the cheddar cheese, Parmesan cheese, Dijon mustard, garlic powder, and black pepper. Cook until the cheeses are melted and the sauce is smooth.
- Combine: In a large mixing bowl, combine the steamed broccoli and cauliflower with the cheese sauce. Mix until the vegetables are evenly coated.
- Prepare the Topping: In a separate bowl, mix the breadcrumbs with melted butter and a pinch of salt.
- Assemble: Pour the vegetable and cheese mixture into a greased baking dish. Sprinkle the breadcrumb mixture evenly over the top.
- Bake: Bake in the preheated oven for 25-30 minutes, or until the top is golden brown and crispy.
- Serve: Allow to cool slightly before serving. Enjoy your creamy gratin!
Cook and Prep Times
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
Nutrition Information
- Servings: 6
- Calories: 320kcal
- Fat: 24g
- Protein: 10g
- Carbohydrates: 20g