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The finished broccoli cauliflower casserole in a white casserole dish and topped with chopped parsley.
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Cheesy Broccoli Cauliflower Casserole

Cheesy Broccoli Cauliflower Casserole is a cozy side dish with tender vegetables, sharp cheddar, and a buttery cracker topping. Perfect for holidays or weeknight dinners.
Prep Time15 minutes
Cook Time25 minutes
Total Time40 minutes
Course: Side Dish
Cuisine: American
Keyword: casserole
Servings: 10 people

Equipment

  • mixing bowls
  • measuring cups and spoons
  • Cutting board
  • Chef’s knife
  • Large pot or Dutch oven
  • whisk
  • Wooden spoon or spatula
  • 9x13-inch baking dish

Ingredients

INGREDIENTS:

  • 1 sleeve Saltine or RITZ Crackers crushed
  • 8 ounces freshly grated extra-sharp cheddar cheese about 2 cups
  • 6 Tablespoons unsalted butter melted
  • 2 large garlic cloves minced
  • 1 teaspoon Salt
  • 1 teaspoon pepper
  • 2 Tablespoons all-purpose flour
  • 1 ¼ cups heavy cream
  • ¾ cup low-sodium chicken broth
  • 16 ounces frozen broccoli florets thawed
  • 16 ounces frozen cauliflower florets thawed
  • 2 teaspoons dried ground mustard

GARNISHES:

  • Fresh Parsley

Instructions

Preheat the oven.

  • Adjust the oven rack to the middle position and preheat to 450°F. Grease a 9×13-inch baking dish and set aside.

Make the cracker topping.

  • In a medium bowl, combine the crushed crackers, 4 tablespoons melted butter, ¼ cup of the shredded cheese, ¼ teaspoon salt, and ¼ teaspoon pepper. Mix until the crumbs are evenly coated.

Cook the base.

  • In a large pot or Dutch oven over medium heat, melt the remaining 2 tablespoons of butter. Add the garlic and cook for 1–2 minutes, stirring often, until fragrant and just golden. Stir in the flour and cook for 1 more minute to form a roux.

Build the sauce.

  • Slowly whisk in the heavy cream and chicken broth until smooth.

Add vegetables and seasonings.

  • Stir in the broccoli, cauliflower, dry mustard, the remaining ¾ teaspoon salt, and ¾ teaspoon pepper. Bring the mixture to a boil, then reduce the heat to medium-low. Cover and simmer for 5–8 minutes, until the vegetables are just tender.

Stir in the cheese.

  • Remove from heat and stir in the remaining 1 ¾ cups shredded cheese until the sauce is melted and creamy.

Assemble the casserole.

  • Pour the mixture into the prepared baking dish. Sprinkle the cracker topping evenly over the top.

Bake.

  • Place in the oven and bake for 10–15 minutes, or until the topping is golden brown and crisp.

Cool and serve.

  • Allow the casserole to cool for about 10 minutes before serving. Garnish with fresh parsley if desired.

Nutrition

Serving: 1cup | Calories: 294kcal | Carbohydrates: 9g | Protein: 9g | Fat: 26g | Saturated Fat: 16g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 0.3g | Cholesterol: 74mg | Sodium: 427mg | Potassium: 352mg | Fiber: 2g | Sugar: 3g | Vitamin A: 1158IU | Vitamin C: 63mg | Calcium: 218mg | Iron: 1mg