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Cauliflower Au Gratin Recipe

Cauliflower Au Gratin

This Cauliflower au gratin recipe with bacon is a lovely low-carb side dish option any time of year!
Course Casserole, Vegetable
Cuisine American
Keyword cauliflower au gratin casserole
Prep Time 15 minutes
Cook Time 45 minutes
Servings 8
Calories 375kcal


  • 2 large heads cauliflower stems removed and separated into evenly-sized florets
  • 1 cup 2 sticks unsalted butter
  • 2 cups heavy cream
  • 3 cups sharp cheddar cheese divided
  • 1 ½ cups cooked and crumbled bacon
  • Sliced green onions garnish


  • Preheat the oven to 350 degrees. Prepare a 9x13 casserole dish with nonstick cooking spray.
  • 2 .Fill a large stockpot with water to three-quarters full. Add about 1 teaspoon salt. Bring the water to a boil over high heat.
  • Add the cauliflower florets and cook for 10 minutes or until fork-tender.
  • Drain the cauliflower well and place in the casserole dish.
  • Sprinkle half of the bacon over the cauliflower and tuck into the cauliflower florets.
  • Meanwhile, in a large skillet, melt the butter over medium-low heat.
  • When the butter is melted, add the heavy cream and bring to a boil, stirring often. Allow mixture to simmer for 10 minutes. Stir in 2 ½ cups of the cheese and stir until melted. Allow sauce to simmer, stirring often, for an additional 3 to 4 minutes or until the sauce coats the back of a spoon and begins clinging to the sides of the skillet.
  • Pour the sauce over the cauliflower and bacon. Top with the remaining cheese and bacon.
  • Bake for 45 minutes or until the cheese has melted and the cauliflower begins to brown.


Calories: 375kcal | Carbohydrates: 3g | Protein: 12g | Fat: 36g | Saturated Fat: 22g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 9g | Cholesterol: 110mg | Sodium: 293mg | Potassium: 89mg | Sugar: 2g | Vitamin A: 1299IU | Vitamin C: 1mg | Calcium: 339mg | Iron: 1mg