This Keto Cauliflower Au Gratin is the perfect comfort food side dish. It goes perfectly with steak, chicken, pork and even seafood.
You are simply going to love this quick and easy au gratin recipe:
I am a big fan of one pot keto meals. I love being able to throw a bunch of healthy low carb ingredients all in one pan and transform them into something delicious. This low carb au gratin recipe is the perfect comfort food side dish. It goes great with just about any protein. Growing up we ate a lot of boxed potatoes au gratin. You know, with those waxy, thinly sliced things that resembled poker chips. We can’t forget the packet of powdered cheese. Well this is not the boxed au gratin of my 80’s childhood. This golden brown and bubbly cauliflower au gratin casserole is sure to because a low carb side dish staple for years to come.
What are some fun ways I can mix up this keto cauliflower au gratin recipe?
- add some broccoli or any of your other favorite low carb vegetables
- add a pinch of nutmeg
- add some chicken or beef and turn this keto side dish into a full meal
- add some smoky bacon
- add some shiritaki noodles and turn it into a low carb pasta dish
- make it with cauliflower rice instead of florets
In addition to this keto cauliflower au gratin, check out some of my other favorite keto side dishes:
- Lemon Pepper Green Beans
- Herbed Goat Cheese Cauliflower Mash
- Low Carb Three Cheese Ham and Broccoli Casserole
- Buttery Cauliflower Rice Pilaf
- Low Carb Cheesy Garlic Creamed Spinach
- Paprika Roasted Radishes and Onions
- Keto Chicken Fried Cauliflower Steaks
Keto Cauliflower Au Gratin
- Prep Time: 25 minutes
- Cook Time: 60 minutes
- Total Time: 1 hour 25 minutes
- Yield: 6 servings 1x
Print Recipe
Pin RecipeIngredients
- 1 large head of cauliflower (6 to 7 inches in diameter), trimmed and cut into florets
- 2 small red onions, thinly sliced
- 2 tablespoons olive oil (I use this brand)
- 2 tablespoons balsamic vinegar
- 1 tablespoon granular erythritol, optional (I use this brand)
- ¾ cup heavy cream
- ½ cup finely grated parmesan
- 1/2 teaspoon sea salt, more to taste
- 1/4 teaspoon black pepper, more to taste
- 1 cup shredded gruyere or gouda cheese
Instructions
- Preheat the oven to 350°F.
- Heat the olive oil in a large skillet over medium heat. Once the pan is hot, add the onions to the pan and cook until soft and tender, about 15 minutes.
- Add the balsamic vinegar and erythritol, if using, to the pan with the onions, and stir to combine. Cook for an additional 5 minutes.
- Add the cauliflower florets to the skillet and toss to combine with the onions.
- In a small bowl, combine the heavy cream, parmesan cheese, salt and pepper. Pour the mixture over top of the cauliflower.
- Sprinkle the gruyere over top and bake for 40 minutes or until the cauliflower is tender and the top is golden brown and bubbly.
Notes
NET CARBS PER SERVING: 7.2g
Nutrition
- Calories: 324
- Fat: 26.5g
- Carbohydrates: 10g
- Fiber: 2.8g
- Protein: 12.5g
Keywords: low carb side dishes, keto side dishes, keto cauliflower recipes, keto au gratin, keto skillet meals
Craveable Keto: Your Low-Carb, High-Fat Roadmap to Weight Loss and Wellness
Check out my other books – HERE
This book has more than 145 recipes, each with a full color photo and nutritional analysis. It is packed with over 100 pages of resources to help make your low carb, keto lifestyle easier. Let’s look at some of the recipes shall we?
BREAKFASTS
- Sausage, Egg, and Cheese Pinwheels
- Cheesy Chorizo Breakfast Biscuits
- Breakfast Pizza
- Baked Eggs with Chorizo and Ricotta
- Baked Egg Jars
- 13 Jon’s Special
- Sausage and Egg Breakfast Sandwich
- Reuben Frittata
- Radishes O/Brien
- Pastrami Breakfast Hash
- Pizza Eggs
- Pancetta, White Cheddar and Spinach Frittata
- Oven-Roasted Garlic and Herb Home Fries
- Lemon Ricotta Pancakes
- Kyndra’s Favorite Buttery Herbed Eggs
- French Toast Egg Puffs
- Keto Everything Bagels
- Creamy Herbed Bacon and Egg Skillet
- Easy Peasy Maple Blender Pancakes
- Cranberry Cream Cheese Spread
- Chocolate Peanut Butter Waffles
- Boosted Coffee
- Vanilla Coffee Creamer
- Parmesan Italian Breadsticks
- Warm Mediterranean Goat Cheese Dip
- Tuna Salad Pickle Boats
- Avocado Feta Salsa
- Marinated Mozzarella Balls
- Sour Lemon Gummy Snacks
- Green Goddess Chicken Dip
- Garlic Dill Baked Cucumber Chips
- Fried Mozzarella Sticks
- Creamy Avocado Pesto Deviled Eggs
- Buffalo Chicken Flatbread
- Bloody Mary Deviled Eggs
- Bacon Chicken Ranch Deviled Eggs
- Baked Avocado Fries
- Asiago Rosemary Bacon Biscuits
- Zuppa Toscana
- Smoked Sausage and Kale Soup
- Mexican Chicken Soup
- Italian Wedding Soup
- Egg Drop Soup
- Cheesy Ham and Cauliflower Soup
- Creamy Lasagna Soup
- Mac Daddy Salad
- Shaved Brussels Sprouts Caesar Salad
- Roasted Cauliflower Mock Potato Salad
- Dill Chicken Salad
- Creamy Cucumber Salad
- Asian Chicken Salad
- Creamy Caesar Salad with Garlic Parmesan Cheese Crisps
- Cobb Salad
- Chef Salad Skewers
- Deviled Ham and Egg Salad Wraps
- Warm Taco Slaw
- Steak Fajita Bowls
- Everything Bagel Dogs
- Spaghetti Squash Pork Lo Mein
- Slow Cooker Spiced Pork Tenderloin
- Slow Cooker Chinese 5 Spice Beef
- Shrimp and Cheese Cauliflower Rice Stuffed Peppers
- Seared Scallops with Sherry Beurre Blanc
- Sausage, Shrimp, and Chicken Jambalaya
- Reuben Biscuit Sandwiches
- Pork Egg Roll in a Bowl
- Philly Cheesesteak Casserole
- Peanut Chicken Skillet
- Pan-Seared Chicken With Balsamic Cream Sauce, Mushrooms and Onions
- Lemon Sherry Chicken
- Lasagna Zucchini Roll-Ups
- “Just like the real thing” Lasagna
- Fried Cabbage with Kielbasa
- Barbecue Dry Rub Ribs
- Dill Pickle Juice Brined Fish and Chips
- Crispy Chicken Thigh and Vegetable Sheet Pan Dinner
- Creamy Pesto Chicken Zucchini Pasta
- Chicken Cordon Bleu Pizza
- Cheesy Smoked Sausage and Cabbage Casserole
- Best Ever Fork and Knife Pub Burger
- Beef Stuffed Poblanos with Lime Crema
- Asian Beef Skewers
- Oven Roasted Cabbage Wedges with Dijon Vinaigrette
- Mascarpone Creamed Greens
- Green Beans with Shallots and Pancetta
- Ginger Lime Slaw
- Dill Pickle Coleslaw
- Parmesan Roasted Broccoli
- Fiesta Cauliflower Rice
- Creamy Herbed Slow Cooker Cauliflower Mash
- Cranberry Pecan Cauliflower Rice Stuffing
- Chorizo and Garlic Brussels Sprouts
- Charred Asian Asparagus and Peppers
- Butter Roasted Radishes
- Brussels Sprouts Au Gratin with Ham
- Lemon Caper Whole Roasted Cauliflower
- Sautéed Mushrooms with Garlic Mascarpone Cream Sauce
- Salted Caramel Nut Brittle
- Dark Chocolate Mousse
- Maple Butter Pecan Truffles
- Mason Jar Chocolate Ice Cream
- Lemon Coconut Cheesecake Bites
- Flourless Chewy Chocolate Chip Cookies
- Chocolate Peanut Cheesecake Balls
- Chewy Peanut Butter Cookies
- Blueberry Mojito Ice Pops
- Almond Joy Chia Seed Pudding
- Fresh Whipped Cream
- Thousand Island Dressing
- Garlic Parmesan Caesar Dressing
- Ranch Dressing
- Avocado Green Goddess Dressing
- Asian Vinaigrette
- Dill Pickle Vinaigrette
- 2-Minute Mayo
- Cajun Mayo
- Walnut Avocado Pesto
- Bacon Jam
- Garlic Parmesan Cream Sauce
- Pizza Sauce
- Enchilada Sauce
- Not-So-Secret Burger Sauce
- Cranberry Ginger Quick Jam
- Seasoning Salt
- Mexican Seasoning Blend
- Cajun Seasoning
- Everything Bagel Seasoning
- Barbecue Dry Rub
- Savory Breading Mix
- Nut-Free Keto Breading Mix
- Pizza Crust
- Nut-Free Pizza Crust
SNACKS AND STARTERS
SOUPS AND SALADS
MAIN DISHES
SIDES
SWEET TREATS
DRESSINGS, SAUCES, SEASONINGS, AND MORE
Got a craving? YOU CAN GRAB A COPY – HERE
Naomi is the force behind Naomi Sherman | Food Creative. She is passionate about recipe development, food photography and styling. An accomplished home cook who was diagnosed with an auto-immune disease eight years ago, Naomi started to explore the connection between healthy, whole food and her symptoms, and a new love was born. Naomi loves nothing more than to take old-school favourites and give them a healthy twist. “There is nothing more fun than creating an amazing dish and then being able to style and photograph it to share with the world.” She fiercely believes that what you put in your body is one of the most important factors for your physical, and mental, wellbeing.
LBH says
This was so good! My husband love fed it and said he’d eat it every night! I added a little smoked paprika. And used yellow onion, because that’s what I had. Delish!
★★★★★
Melissa says
This was amazing! I can marine adding, cooked chicken, and or bacon for a one dish dinner. I loved the flavor the balsamic caramelized onions added. Thank you!
Melissa says
That should be “I can imagine” LOL!