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Freshly baked dish showcasing melted cheese over tender cauliflower, garnished with sprigs of thyme.

Baked Cheesy Cauliflower Casserole

Baked Cheesy Cauliflower Casserole is a rich and comforting side dish made with tender cauliflower baked in a creamy cheese mixture of white cheddar, mozzarella, parmesan, eggs, and cream until golden.
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Course: Main Course, Side Dish
Cuisine: American
Keyword: Baked Cheesy Cauliflower Casserole
Prep Time: 15 minutes
Cook Time: 40 minutes
Servings: 12

Ingredients

  • 2 heads cauliflower cut into florets
  • 5 eggs
  • 1 1/2 cups heavy cream
  • 1 1/2 teaspoons salt
  • 1/2 teaspoon black pepper
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 4 tablespoons butter melted
  • 2 cups shredded white cheddar cheese
  • 1/2 cup grated parmesan cheese
  • 1/2 cup shredded mozzarella cheese
  • Additional 1/2 cup grated parmesan cheese for topping

Instructions

Preheat the Oven

  • Preheat the oven to 350°F. Lightly grease a 9x13-inch baking dish.

Prepare the Cauliflower

  • Bring a large pot of water to a boil. Add the cauliflower florets and cook for 3 to 4 minutes, or until just tender.
  • Drain the cauliflower thoroughly to remove as much excess moisture as possible, then transfer it to the prepared baking dish.

Prepare the Cheese Mixture

  • In a medium mixing bowl, beat together the eggs, heavy cream, salt, black pepper, garlic powder, and onion powder until well combined.
  • Stir in the shredded white cheddar cheese, grated parmesan cheese, and shredded mozzarella cheese.
  • Add the melted butter, ensuring it has cooled slightly before mixing it into the egg mixture.

Assemble the Casserole

  • Pour the cheese mixture evenly over the cauliflower in the baking dish.
  • Sprinkle the additional 1/2 cup grated parmesan cheese over the top.

Bake

  • Bake for 35 to 40 minutes, or until the casserole is set and the top begins to brown.

Serve

  • Remove from the oven and allow the casserole to rest briefly before serving. Serve warm.

Notes

This recipe is naturally close to gluten free, but it is important to confirm that the shredded cheeses, grated parmesan, garlic powder, onion powder, and any packaged ingredients are certified gluten free, as some brands may contain anti-caking agents or additives with hidden gluten. Use a clean baking dish, utensils, and prep area if cross-contact is a concern. If serving this casserole with other side dishes, choose certified gluten-free options to keep the full meal gluten free.