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Mashed Celeriac | The BEST Low Carb Mashed Potato Substitute

Creamy mashed celeriac is the best low carb mashed potato substitute you’ll find – No cauliflower needed for this low carb mash. Celery root mash is rich, creamy, and buttery. A perfect low carb replacement for mashed potatoes for your next holiday spread, roast, or as a keto friendly side for your weeknight dinner.

Creamy mashed celery root in a grey bowl with sage and melted butter.

Just 7g net carbs per serving!

This recipe is part of my low carb holiday meal series. Pair this low carb side with a mouthwatering dry brine turkey.




Disclosure: Some of the links below are affiliate links, meaning, at no additional cost or effort to you, I will earn a small commission if you click through the link and make a purchase.

No holiday meal is complete without a buttery rich mash. Whether you are serving a mouthwatering roast, or a seasonal turkey, mashed potatoes are a perfect side to soak up all the delicious gravy. 

Celeriac (celery root) puree is a perfect keto friendly substitute for mashed potatoes and it is just as rich, buttery, and delicious.

Why you will love this low carb mash

  • Just as easy to make as mashed potatoes but low carb!
  • No cauliflower and no potatoes needed for this mash.
  • Celeriac mash is buttery, creamy, rich, and a perfect low carb side for roasts, turkey, and weeknight dinners.
  • Low in net carbs, this recipe is a healthy keto friendly replacement for mashed potatoes. 
  • Can be made ahead to save time, perfect for meal prep.
Keto mashed celeriac on a spoon over a bowl of mash.

What is Celeriac?

Celeriac is also referred to a celery root and is the bulbous root of a specific variety of celery. Celeriac is very similar to other root vegetables like turnips, although its much larger, and has smaller roots near the base. It has a thin papery skin and white flesh very similar to a potato. Unlike other root vegetables, celery root is lower in starch making it a perfect low carb replacement for potatoes.

A whole unpeeled celeriac (celery root) on a white marble surface.
Whole celeriac (celery root)

What Does Celeriac Taste Like?

Celeriac has a subtle celery like flavour with a slight nuttiness to it. Eaten cooked or raw, celery root takes on the flavours of other ingredients making it great for stews, soup and making mash. Raw the texture is firm and somewhat crunchy, cooked the texture is creamier and can be fibrous if not treated correctly. 

Where to Find Celery Root

Celery root is usually found in the produce section of the grocery store, unlike other root vegetables it may be in the refrigerated section of the produce aisle. You have probably passed by it a hundred times and ignored it due to its unsightly appearance, but don’t be put off by its looks, celeriac is an underrated low carb vegetable that is absolutely delicious. 

Is Celeriac Keto friendly?

Thanks to its low starch content, celeriac or celery root is keto friendly. This low carb root vegetable has only 5.6g of net carbs per 100g, about 3 times lower in carbs than a potato. 

Is Celeriac Mash Healthy For You?

Celeriac is a healthy low calorie, low carb vegetable. With very little starch, celery root is a healthy choice for those on a low carb diet trying to limit sugar intake or manage blood sugar. Celery roots is also full of vitamin K as well as vitamin C, potassium, B vitamins, and phosphorus.

A bowlful of low carb mashed celery root ready for a holiday meal.

Tips for Making the BEST Celeriac Mash

  • Boil the celeriac in heavily salted water until fork tender to make it easier to puree.
  • To avoid a fibrous chunky mash use an immersion blender or a food processor to puree the cooked celeriac until smooth.
  • Continue to cook down the puree to reduce the water content and thicken the mash. This is a crucial step to avoiding a watery flavourless low carb mash. 
  • Be generous with the butter and cream. Celery root is very lean and needs fat to make it rich and flavourful. 

What To Serve With Celeriac Mash

Use as a keto friendly side for a holiday turkey, roast, or as part of a weeknight dinner with your favourite low carb main. This recipe is intended as a low carb replacement for mashed potatoes and can be paired with any dish you would normally serve with mashed potatoes. 

Serve any of these delicious low carb main dishes that pair perfectly with mash

Make Ahead, Reheating, and Leftover Storage

Celeriac mash can be made ahead of time for a holiday meal or for healthy low carb meal prep. 

Allow the mash to cool and then store in an airtight container in the fridge for up to 5 days. 

It is not recommended to freeze celeriac mash as the texture will change and it won’t taste as fresh. 

Reheating –  Reheat leftovers in the microwave, or on the stove top with some extra butter until warmed through.

A bowl full of fluffy low carb mashed celery root garnished with butter and sage.

Recipe Card

Mashed Celeriac (Low Carb)

A bowl full of fluffy low carb mashed celery root garnished with butter and sage.
Prep Time 10 minutes
Cook Time 25 minutes
Servings 8 servings
Calories 195 kcal
Net Carbs 7.1 g
Rate this Recipe
Creamy celeriac mash is the BEST low carb replacement for mashed potatoes. This perfect keto friendly mash is rich, buttery, and full of flavour. An easy to make low carb side dish ideal for your holiday table or weeknight meals paired with turkey, roast beef, steak, meatballs or fried chicken. If you love mashed potatoes, you will love this keto friendly celeriac mash.

IMPORTANT – There are often Frequently Asked Questions within the blog post that you may find helpful. Simply scroll back up to read them!




  • 2 pounds celeriac about 2 large celery root
  • salt
  • cup heavy cream
  • ½ cup butter salted
  • fresh thyme to garnish


  • Prepare the celeriac. Wash the celeriac thoroughly to remove any dirt. Remove the lower portion of fine roots with a sharp knife. Using a vegetable peeler or knife, remove the thin brown skin. Cut the peeled celeriac into large 1-2 inch [2.5 - 5 cm] cubes.
    2 pounds celeriac
  • Boil the celeriac. Bring a large pot of heavily salted water to a rapid boil and add the cubed celeriac. Boil for 10-12 minutes until the celeriac is fork tender, and drain into a colander.
  • Mash the celeriac. Add the celeriac back to the pot and use a potato masher to break down the chunks of celeriac into a coarse mash. Next puree the mashed celeriac to a smooth consistency using an immersion blender or by adding to a food processor.
  • Cook down the pureed celeriac. Place the pot of pureed celeriac over medium-low heat and add the heavy cream. Cook, stirring occasionally for 5-10 minutes until the celeriac thickens. Add the butter and cook again until the desired consistency is reached. The heat should be low enough to avoid browning the celeriac. Season with salt and pepper, and garnish with fresh thyme before serving.
    ⅓ cup heavy cream, ½ cup butter, fresh thyme


Using an immersion blender or a food processor is necessary to get the smooth potato like texture in this mash. A potato masher alone will not suffice. 
Leftovers: Store leftovers sealed in the fridge for use within a week. 
This recipe can easily be meal prepped and made ahead of time in preparation for a holiday meal.
Reheating: Reheat in a pot on the stove over medium-low heat with additional butter if necessary. 
You can also reheat in the microwave.


Serving: 0.5 - cupsCalories: 195kcalCarbohydrates: 11.7gProtein: 2.2gFat: 15gSaturated Fat: 9.4gSodium: 500mgPotassium: 386mgFiber: 2.3gSugar: 2.3gVitamin C: 10mgCalcium: 63mgIron: 0.9mgSugar Alcohols: 2.3gNet Carbs: 7.1g

Nutritional information is calculated using the recipe calculator and verified database available from Cronometer. Although every reasonable effort is made to provide accurate information this estimate is provided as courteously and convenience only. To obtain the most accurate representation of the nutritional information in any given recipe, you should calculate the nutritional information with the actual ingredients used in your recipe.

Try the free recipe calculator at Cronometer
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Looking for a different low carb recipe?Something you don't see here or looking for a low carb version of your favourite recipe? Let me know so I can get working on it! Contact me directly or leave a comment!
Keywords: christmas dinner, easter dinner, holiday sides, low carb holiday recipes, side for turkey, Thanksgiving sides, Vegetarian





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