Cheesy Cauliflower Casserole

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Step 2: Make the Cheesy Sauce

  1. In a medium saucepan, melt the butter over medium heat.
  2. Stir in the flour and cook for 1–2 minutes to form a roux. This will help thicken your sauce.
  3. Gradually whisk in the milk, making sure to remove any lumps.
  4. Add Dijon mustard, garlic powder, salt, and pepper.
  5. Stir continuously until the sauce thickens (about 5–7 minutes).
  6. Remove from heat and stir in 1 cup shredded cheddar cheese until smooth and creamy.

Step 3: Assemble the Casserole

  1. In a greased 9×13-inch baking dish, place the blanched cauliflower evenly.
  2. Pour the cheese sauce over the cauliflower, ensuring all florets are coated.
  3. Sprinkle Parmesan cheese evenly on top.
  4. If you like a crunchy topping, mix breadcrumbs with a teaspoon of melted butter and sprinkle over the cheese.

Step 4: Bake

  1. Place the casserole in the preheated oven.
  2. Bake for 20–25 minutes, until the top is golden and bubbly.
  3. If the breadcrumbs or cheese aren’t browned enough, broil for an additional 1–2 minutes. Keep a close eye to avoid burning.

Step 5: Serve

  1. Remove the casserole from the oven and let it rest for 5 minutes.
  2. Garnish with fresh parsley if desired.
  3. Serve warm as a comforting side dish or even as a main for a lighter meal.

Tips for the Best Cheesy Cauliflower Casserole

  • Cheese variety: Mix cheeses like Gruyère, Monterey Jack, or Fontina for a more complex flavor.
  • Extra flavor: Add sautéed onions or garlic to the sauce for an aromatic boost.
  • Low-carb option: Skip breadcrumbs or use crushed pork rinds or almond flour as a topping.
  • Make ahead: You can assemble the casserole a day ahead and bake it just before serving.

Why You’ll Love It

Cheesy Cauliflower Casserole is creamy, flavorful, and has just the right texture—soft cauliflower with a golden, cheesy crust. It’s a healthier alternative to traditional potato or macaroni casseroles without sacrificing taste. Even picky eaters will love it, and it pairs beautifully with roasted meats, grilled chicken, or holiday ham.


If you want, I can also make a shortcut version that’s even faster, using frozen cauliflower and a one-pan method—but still cheesy and delicious.

Do you want me to write that version too?

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