Keto Diet App - Free Download Keto Diet App - Free Download
Take the guesswork out of following a low-carb diet, lose body fat & feel great!
KetoDiet app is FREE to download!

Homemade Sugar-Free Ketchup

4.8 stars, average of 539 ratings

This post may contain affiliate links, see our disclaimer.

Homemade Sugar-Free KetchupPin itFollow us 148.4k

Making healthy sugar-free ketchup is easy! This recipe is also featured in our KetoDiet App and my first book! It takes just a few minutes to prepare and tastes so much better than any store-bought ketchup. Depending on the ingredients you use, it will only take 5 minutes (with garlic and onion powder) or up to 15 minutes (if you use fresh garlic and onion).

This tasty low-carb ketchup goes well with Low-Carb "French Fries" made with rutabaga instead of starchy potatoes. And if you can find parsley roots, it's definitely worth making these Parsley Root Fries!

If you're still not sure if it's worth making your own ketchup, here is a list of ingredients found in one of the most popular ketchup products (Heinz):

Tomato concentrate from red ripe tomatoes, distilled vinegar, high fructose corn syrup (the worst type of sweetener!), corn syrup, salt, spice, onion powder, natural flavouring (you can never be sure what this ingredient stands for).

Hands-on Overall

Serving size 1 tbsp/ 15 ml

Allergy information for Homemade Sugar-Free Ketchup

✔  Gluten free
✔  Dairy free
✔  Egg free
✔  Nut free
✔  Pork free
✔  Avocado free
✔  Coconut free
✔  Fish free
✔  Shellfish free
✔  Beef free

Nutritional values (per serving, 1 tbsp/ 15 ml)

Net carbs0.9 grams
Protein0.2 grams
Fat0 grams
Calories5 kcal
Calories from carbs 79%, protein 16%, fat 5%
Total carbs1.1 gramsFiber0.2 gramsSugars0.6 gramsSaturated fat0 gramsSodium86 mg(4% RDA)Magnesium2 mg(1% RDA)Potassium44 mg(2% EMR)

Ingredients (makes about 1 1/2 cups)

  • 1 cup tomato paste (240 g/ 8.5 oz)
  • 1/4 cup apple cider vinegar or wine vinegar (60 ml/ 2 fl oz)
  • 1 small onion (60 g/ 2.1 oz) or 1/2 tsp onion powder or 1 tsp onion granules
  • 2 cloves garlic or 1/4 tsp garlic powder or 1/2 tsp garlic granules
  • 1/8 tsp ground allspice
  • 1/8 tsp ground cloves
  • 2 tbsp Allulose or Erythritol (20 g/ 0.7 oz)
  • Optional: 3-6 drops liquid Stevia for more sweetness
  • 1 tsp sea salt, or to taste
  • 1/2 tsp ground black pepper, or to taste
  • 2 to 4 tbsp water to thin down


  1. Peel and cut the onion and garlic in smaller pieces. Have all the other ingredients on hand ready to be used. Homemade Sugar-Free Ketchup
  2. Place everything in a small sauce pan and simmer over low heat for 5-10 minutes. Add a dash of water if it's too thick. Homemade Sugar-Free Ketchup
  3. Place everything in a blender or use an immersion blender and pulse until smooth.
    Note: If you're using garlic powder and onion powder (or granules), you can skip the blending altogether. You will only need to heat it up and cook for a minute to let the sweetener dissolve. Homemade Sugar-Free Ketchup
  4. Done! Pour in a glass jar and keep in the fridge up to a month or preserve for longer (water-bath canning works best). Try with Low-Carb French Fries made with rutabaga or Parsley Root Fries. Homemade Sugar-Free Ketchup

Ingredient nutritional breakdown (per serving, 1 tbsp/ 15 ml)

Net carbsProteinFatCalories
Tomato purée (paste, unsweetened)
0.6 g0.1 g0 g3 kcal
Apple cider vinegar
0 g0 g0 g0 kcal
Onion, brown (yellow), raw
0.1 g0 g0 g1 kcal
Garlic, fresh
0.1 g0 g0 g0 kcal
Allspice, dried, spices
0 g0 g0 g0 kcal
Cloves, spices
0 g0 g0 g0 kcal
Stevia extract (SweetLeaf or NuNaturals, natural low-carb sweetener)
0 g0 g0 g0 kcal
Erythritol (natural low-carb sweetener)
0 g0 g0 g0 kcal
Salt, sea salt
0 g0 g0 g0 kcal
Pepper, black, spices
0 g0 g0 g0 kcal
Water, still
0 g0 g0 g0 kcal
Total per serving, 1 tbsp/ 15 ml
0.9 g0.2 g0 g5 kcal

Homemade Sugar-Free KetchupPin itFollow us 148.4k

Do you like this recipe? Share it with your friends! 

Martina Slajerova
Creator of

Martina Slajerova

I changed the way I ate in 2011, when I was diagnosed with Hashimoto’s, an autoimmune disease that affects the thyroid. I had no energy, and I found it more and more difficult to maintain a healthy weight.

That’s when I decided to quit sugar, grains, and processed foods, and to start following a whole-foods-based ketogenic approach to food.

Let us know what you think, rate this recipe!

Leave a comment

Note: Any links to products or affiliate links will not be approved.
Please note that we do not offer personalised advice. For any diet related questions, please join our Facebook community.

Comments (58)

Hi, can a jar of tomato Passata be used for the tomato paste.
Thank You

You could use it but you will need to cook it for longer to reduce it. Tomato paste is thick but pasta is almost like thicker tomato juice.

This is the best ketchup I’ve ever had the pleasure of tasting. Truly exceptional. Thank you so much! I cannot wait to try more of your recipes, as this was my first one.

Thank you Safi!

How long does it last thanks

I keep mine for up to a month.

Thanks for sharing the secret recipe with us. The tomato ketchup recipe looks thick and flavorful with those lovely ingredients. It sounds wonderful. It would be helpful for everybody, who would like to cook tomato ketchup recipe. As usual, the pictures look stunning.
Thanks a lot Anders! I love simple recipes so much 😀
How long does this last? Can it be made ahead?

Thank you Lily! I keep mine sealed in the fridge for up to a month.

This ketchup is a HUGE hit in our house. My extremely picky ketchup-loving 4 year old absolutely loves this stuff and I couldn’t be happier about cutting out all that extra sugar. Thanks so much for a gold-star recipe!

Thank you so much Andi, I'm so happy to hear that!

Made this today - yummo! Thanks for sharing ☺

I gave up eating ketchup a few years ago, when I went lo-carb. However, I am trying to encourage my husband to reduce his carb intake so I made a batch of this ketchup. It was absolutely delicious. I then used it to make your BBQ sauce and that was amazing! Big thanks to you for all of your wonderful recipes!

Thank you for your kind words, I'm glad you enjoyed both of them! 😊

How many calories does the healthy homemade ketchup have? I made it and it’s amazing

Hi Kim, "calories" are listed as kcal.

Tomatoe puree or paste

I suppose "paste" - it is the concentrated, thick paste. Where I live we use these interchangeably 😊

Mine came out to sweet. But it tasted really good with sweet potato fries. I will make this again, thank you!!!!!

I think that may happen with some types of tomatoes - some are sweeter than others so I'd skip the sweetener or use it "to taste" 😊

Can this be frozen?

I haven't thought of that but I think you can freeze it in an ice cube tray. I do that with my BBQ sauce and Thai curry paste.

Is it ok to lwave the sweeteners out? I have PCOS nad just can't use any...

Absolutely! Sweeteners are always optional in recipes like these - it depends on your palate.

Hi there,
Any substitutes for spices below;
⅛ tsp ground allspice
⅛ tsp ground cloves
Is it ok if i skip both of it?

Hi Philip, I think you can skip these - there won't be any substitutions for these.

This worked really well! I made one batch as a test and then three more the next night... great recipe; thank you!

I a long-time lover of Heinz, hater of Hunts, 365, and all other grocery ketchups. I have been guiltily eating Heinz out of the fridge, even though we went keto 3 months ago. I made this recipe for a keto meatloaf, and after I tasted it, I poured all my Heinz down the sink. I'd rather have the Heinz bottle for my winter sowing in the garden than the ketchup that was in it. That's how much I love this recipe. Thanks!
P.S. This went extra fast for me because I didn't simmer and I didn't immersion blend--I just pressed the onion and garlic through my garlic crusher and added in a can of tomato paste for thickness. So good!

Thank you Elle, it's good to know! 😊

For how long does this stay good in the refrigerator?  

I usually use mine in just a few weeks or a couple of months. If sealed properly, it should last for up to 6 months.

Hi, I just made this recipe and it tastes great!! Now I won't miss store-bought ketchup! This recipe was very easy to follow and I already had everything on hand. Thank you for posting it!

Thank you Evelyne!

Thank you for posting this recipe.  My family loves it.  I am making a double batch today.  My husband says it gets better tasting every day as it mellows.  YUM!

Thank you Cathy!

Best. Ketchup. Ever.  I've been low carb for three years, but I've been missing my favourite condiment.  No more!!  So so good.  

Thank you so much!!

Hi Martina,
Do you know any brand of tomato puree that can be bought in UK with a similar carb content to the one you linked?
I have today bought a Biona Tomato Puree, but unfortunately the label says it has around 14grams of carbs, even though it says only 7.1 grams on their website...

As long as it's only made with tomatoes and with no added sugar, you should be fine 😊

OMG we just made this and it is amazing. Nice and tangy. The allspice and cloves add the perfect hint of tastiness. A new staple in our home for sure!!!!! Now if we could just figure out how to make keto maple bar donuts we would never even leave keto for a minute!!!
Perfect ketchup though! Perfect

Thank you Jay, I'll put those in my to-do list! 😊 Here's recipes you might like: Homemade Sugar-Free Maple Flavored Syrup
and The Best Keto Pancakes

Hello! Great tomato ketchup recipe you have shared. I really like this tomato ketchup recipe. Good going. Last Sunday, I gave the party to my friends. Where, I have served tomato ketchup recipe to all my friends. They all were praised me for this dish. Thanks.

Thank you!

Question, what do you mean by preserve for longer? Are there extra steps you can give in the recipe for preservation?

Hi Leah, I will - thanks for the feedback. I use a water bath canning method:

How long would you hot bath it?

I'd say just a couple of minutes so that the air gets out and the jar is sealed.

Thanks Martina!  Actually I found that I had one can of tomato puree and went ahead and made it.  It tastes delicious.  Now I do not need to use store bought any more!

Great, glad you like it! 😊

Hi Martina,  Thanks for all your delicious recipes.  I want to make the ketchup today, but all I have is tomato sauce, instead of tomato puree.  Can I use it? Or should I cook it down for a while first?

Hi Rebecca, you can use tomato sauce instead but you'll have to cook it down to get the right consistency. Also, the flavour may not be as strong with tomato sauce. Hope it works! 😊

Load more comments, 6 remaining