These cheesy baked turnips are the ultimate low carb alternative to au gratin potatoes. This dish is the perfect side for your holiday dinners and it’s easy to prepare too!
Looking for more low carb holiday side dish ideas? Give this Low Carb Green Bean Casserole or Roasted Garlic Mashed Cauliflower with Perfect Keto Gravy a try.
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MORE LOW CARB SIDE DISH RECIPES:
Loaded Cauliflower Casserole | Cheesy Bacon Ranch Brussels Sprouts
I can't believe it is just a few days until Christmas!
How does it sneak up on me every single year?
I mean, it's not like the date changes. Like it is a surprise from year to year.
That would make sense right? But I don't have that easy excuse.
I don't have any excuse. I always have the best intentions, I just don't seem to be able to plan well. Even though I try so hard.
I may have last-minute shopping to do, but at least this year I do have my menu planned out.
What's on my menu?
- Low Carb Charcuterie Board
- Low Carb Oyster Stew
- Rib Roast with Garlic Herb Butter
- Turnips Au Gratin
- Sheet Pan Roasted Vegetables
- Low Carb Green Bean Casserole
- Keto Coconut Cheesecake (Dairy-free)
INGREDIENTS FOR TURNIPS AU GRATIN
What you will need:
- Turnips
- Butter
- Sea salt
- Fresh cracked black pepper
- Organic garlic powder
- Sharp white cheddar cheese, grated
- Heavy cream`
- Fresh thyme leaves
HOW TO MAKE THIS TURNIPS AU GRATIN
STEP 1
STEP 2
Peel the turnips and slice them 1/8 inch thick (or use a mandolin).
STEP 3
Grease a quart baking dish with 1 tablespoon of the butter.
STEP 4
Combine the salt, pepper, and garlic powder in a small bowl.
STEP 5
Spread 1/3 of the turnips in the bottom of the dish.
STEP 6
Top with 1/3 each of the cream, cheese, salt mixture, butter, and thyme.
STEP 7
Repeat with the next 2 layers, finishing with the last 1/3 of the cheese.
STEP 8
Cover with foil and bake for 45 minutes.
STEP 9
STEP 10
If the top is not golden brown enough, you can place the gratin under the broiler for a minute or two. DO NOT walk away, it will happen quickly.
STEP 11
Allow the gratin to rest for 10 minutes before serving.
FAQ ABOUT TURNIPS AU GRATIN
Can I make this dish ahead of time? Absolutely! I always make this ahead of time to save on day of preparation chaos. I just make it all, cover the dish with foil, and pop it into the fridge. Then I bring it out and leave it on the counter for a couple of hours before I put it in the oven, just to let it warm up a bit.
How do I store my leftovers? I just store the leftovers, if there are any, in an airtight container in the refrigerator for up to 4 days.
Can I freeze this? You can store them in an airtight container and freeze them for up to 2 weeks. You can also freeze them in the dish they were baked in, but cover it tightly with foil. Freezing may cause the texture to change a bit.
I have to be honest with you and say that a couple of years ago I would have never thought I would be eating, eating or posting turnip recipes.
I, in my 50 some years of life, had never even tried a turnip.
But going low carb, and missing potatoes will make you try some crazy things. Or at least what might seem crazy at the time.
But turnips blem my mind. Kevins too!
We both love them as a potato substitute. We love them in soups, hash, and in this au gratin recipe.
We are even going to grow them in our garden next year!
So, if you have never tried turnips, hopefully, that will put your mind at ease and you will give this recipe a try!
MORE KETO POTATO SUBSTITUTE RECIPES

Turnips Au Gratin
Yield: 8 servings
Prep time: 15 MinCook time: 65 Mininactive time: 10 MinTotal time: 1 H & 30 M
These cheesy baked turnips make are the ultimate low carb alternative to au gratin potatoes. This dish is the perfect side for your holiday dinners and it’s easy to prepare too!
Ingredients
- 2 pounds turnips (opt for medium to smaller sized turnips)
- 4 tablespoons butter, diced and divided
- 1 teaspoon sea salt
- 1/2 teaspoon fresh cracked black pepper
- 1 teaspoon organic garlic powder
- 2 cups (8 ounces) sharp white cheddar cheese, grated
- 1 1/4 cups heavy cream`
- 1 teaspoon fresh thyme leaves
Instructions
- Preheat oven to 375 degrees F.
- Peel the turnips and slice them 1/8 inch thick (or use a mandolin).
- Grease a quart baking dish with 1 tablespoon of the butter.
- Combine the salt, pepper, and garlic powder in a small bowl.
- Spread 1/3 of the turnips in the bottom of the dish.
- Top with 1/3 each of the cream, cheese, salt mixture, butter, and thyme.
- Repeat with the next 2 layers, finishing with the last 1/3 of the cheese.
- Cover with foil and bake for 45 minutes.
- Remove foil and continue to bake for an additional 20 minutes or until the turnips are tender and the cream is absorbed, and the top is turning golden brown.
- If the top is not golden brown enough, you can place the gratin under the broiler for a minute or two. DO NOT walk away, it will happen quickly.
- Allow the gratin to rest for 10 minutes before serving.
Calories
191.70Fat (grams)
15.27Sat. Fat (grams)
8.99Carbs (grams)
7.01Fiber (grams)
2.35Net carbs
4.66Sugar (grams)
3.54Protein (grams)
7.41Sodium (milligrams)
512.88Cholesterol (grams)
43.23Nutritional information is provided as a courtesy and is approximate only.
We cannot guarantee the accuracy of the nutritional information given for any recipe on this site.
Erythritol carbs will not be included as it has a glycemic index of 0 (meaning it does not spike blood sugar) and it's not metabolized. Net carbs are the total carbs minus fiber.
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