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5 from 1 vote

Cauliflower Au Gratin

Keto Cauliflower Au Gratin is just as creamy and flavorful as Au Gratin Potatoes but with only 6 net carbs per serving. This gluten free side dish is the perfect comfort food!
Prep Time15 mins
Cook Time1 hr
Total Time1 hr 15 mins
Course: Side Dish
Cuisine: American, Gluten Free, Low Carb, Pork
Servings: 6 servings
Calories: 402kcal


  • 4 cups cauliflower * cut florets into slices about 1/4" thick
  • 4 slices bacon * cooked and crumbled
  • 1 1/2 cups cheddar cheese * shredded
  • 1 1/2 cups heavy cream
  • 6 cloves garlic * minced
  • 1/2 teaspoon salt
  • 1/4 teaspoon pepper


  • Preheat your oven to 350° F.
  • Place a layer of the sliced cauliflower florets into the bottom of a medium size baking dish and top with one third of the cheddar cheese and bacon.
  • Cover the cheese and bacon with another row of cauliflower, then another third of the cheese and bacon.
  • Top with one last layer of cauliflower. Set the remaining bacon and cheese aside.
  • Whisk together the heavy cream, garlic, salt, and pepper.
  • Pour all of the cream mixture evenly over the top of the cauliflower and cover tightly with foil.
  • Bake for 45 minutes, or until fork tender.
  • Once the cauliflower is tender, remove the foil and add the remaining cheddar cheese and bacon to the top.
  • Return to the oven for 5-10 more minutes, or until the cheese is melted and starting to brown.


Tips and Techniques for the Best Keto Cauliflower Au Gratin

  • Cut the cauliflower into thin slices that resemble sliced potatoes and for easier layering.
  • Shred the cheese from a block rather than using pre-shredded bagged cheese. Bagged shredded cheese contains anti-caking agents that don't allow the cheese to melt as nicely and give it a grittier texture.
  • If you prefer a thicker sauce, you can try low carb thickeners (I don't care for them), or add 1-2 tablespoons of gluten free or regular flour (if you're not low carb).
  • Store leftovers in an air-tight container in the refrigerator. Use within 3-5 days for best results.
** Nutritional information is an estimate and may vary.


Serving: 1serving | Calories: 402kcal | Carbohydrates: 7g | Protein: 12g | Fat: 37g | Saturated Fat: 22g | Cholesterol: 121mg | Sodium: 509mg | Potassium: 313mg | Fiber: 1g | Sugar: 2g | Vitamin A: 1158IU | Vitamin C: 33mg | Calcium: 262mg | Iron: 1mg