This Keto Cauliflower Au Gratin is the perfect comfort food side dish. It goes perfectly with steak, chicken, pork and even seafood.
A quick and easy keto 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.
Substitutions and Swaps
- 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
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Keto Cauliflower Au Gratin
- Total Time: 1 hour 25 minutes
- Yield: 6 servings 1x
Ingredients
- 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
- ½ teaspoon sea salt, more to taste
- ¼ 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
- Prep Time: 25 minutes
- Cook Time: 60 minutes
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
Laura says
This recipe is so good! I’ve made it several times and it’s become a favorite in my home.
★★★★★
ChapelHillBetsy says
I would love to make this but I can no longer lift an iron skillet. I'm not sure I have an oven safe skillet. After I combine the cauliflower florets with the onions, can I transfer everything from the skillet to a baking dish then pour over the heavy cream, parmesan cheese, salt and pepper mixture?
Kyndra Holley says
Yes, that should work just great
Penny Howard says
This is such a wonderful dish! We have enjoyed it several times. Great comfort food!
★★★★★
Nancy says
Can I sub a different cheese rather than gruyere or gouda cheese
I would rather use cheese that I have on hand 😊❤️🌹
Kyndra Holley says
You can use any cheeses that you have on hand.
Sandra O'Neil says
Delicious I've added caramelized Brussel sprouts too with bacon
Steve Barclay says
This is really a great recipe. I add some diced ham also let stay in the oven an extra 10 minutes.
★★★★★
Mare says
how much nutmeg should i add?
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!
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!
★★★★★