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Broccoli Cauliflower Casserole

Easy Broccoli Cauliflower Casserole recipe

 Broccoli Cauliflower Casserole is a baked dish made with fresh or frozen broccoli and cauliflower mixed in a creamy cheese sauce, then topped with melted cheese or crunchy breadcrumbs. The vegetables bake until tender and covered in a luscious, cheesy coating. This comforting casserole can serve as a hearty side dish or even a meatless main course.

Ingredients

Scale
  • 2 cups broccoli florets (fresh or frozen, steamed until tender)

  • 2 cups cauliflower florets (fresh or frozen, steamed until tender)

  • 1 can (10 oz) cream of mushroom or cream of chicken soup

  • 1 cup sour cream

  • 1 cup shredded cheddar cheese (plus extra for topping)

  • ¼ cup grated Parmesan cheese

  • 1 small onion, finely chopped

  • 1 clove garlic, minced

  • ½ tsp salt

  • ½ tsp black pepper

  • 1 tsp Dijon mustard (optional, for flavor depth)

  • 1 cup breadcrumbs or crushed crackers (for topping)

  • 2 tbsp melted butter

Instructions

  • Preheat the oven – Set oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish.

  • Cook the vegetables – Steam or microwave broccoli and cauliflower until tender-crisp, then drain well to remove excess water.

  • Prepare the sauce – In a large bowl, combine soup, sour cream, cheddar cheese, Parmesan, onion, garlic, salt, pepper, and Dijon mustard. Mix until smooth.

  • Combine everything – Add the cooked broccoli and cauliflower to the sauce mixture and toss until well coated.

  • Assemble the casserole – Transfer the mixture to the prepared baking dish and spread evenly.

  • Add the topping – Mix breadcrumbs with melted butter and sprinkle evenly over the casserole. Add a little extra cheese on top for a golden finish.

  • Bake until bubbly – Bake uncovered for 25–30 minutes until hot, bubbly, and lightly browned on top.

  • Rest before serving – Let it cool for 5 minutes before serving for the perfect consistency.