Easy Low-Carb Homemade Ketchup

4.7 stars, average of 291 ratings

By Martina Slajerova, updated September 7 202056

Keto ketchup is another addition to my collection of healthy homemade ingredients and it's also one of the many recipes included in my apps and book! It takes just a few minutes to prepare and tastes so much better than any store-bought ketchup. It goes great with Low-Carb "French Fries" and I will be using it in one of my recipes next week.

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If you follow me on Instagram, you know that next week's recipes will be all about berries. They are low-carb, delicious and in season. I will be sharing a collection of sweet and savoury recipes starting on Monday!

If you're not convinced that you should to make 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 is).

0 days, 0 hours, 5 minutes

Hands-on 10 minutes Overall 15 minutes

Serving size 1 tbsp/ 15 ml

Allergy information for Easy Low-Carb Homemade Ketchup

✔ Gluten free

✔ Dairy free

✔ Egg free

✔ Nut free

✔ Pork free

✔ Avocado free

✔ Coconut free

✔ Fish free

✔ Shellfish free

Pescatarian

Vegetarian

Vegan

Download Recipe

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 1 medium jar/ 2 cups)

1 cup tomato purée (240 g/ 8.5 oz)
¹/₄ cup apple cider vinegar or white / red wine vinegar, or try my home-made fruit vinegar (60 ml/ 2 fl oz)
1 small onion (60 g/ 2.1 oz)
2 cloves garlic
¹/₈ tsp ground allspice
¹/₈ tsp ground cloves
3-6 drops liquid Stevia
2 tbsp Erythritol or Swerve or other healthy low-carb sweetener from this list (20 g/ 0.7 oz)
1 tsp sea salt
pinch freshly ground black pepper
¹/₄ cup water or more if too thick (60 ml/ 2 fl oz)

Instructions

Peel and cut the onion and garlic in smaller pieces. Have all the other ingredients on hand ready to be used. You can use any vinegar you like such as apple cider or white / red wine vinegar or even try making your own fruit vinegar. I used cherry vinegar in this recipe.
Place everything in a small sauce pan and simmer over low heat for 5-10 minutes. Add a bit more water if too thick.
Place everything in a blender or use an immersion blender and pulse until smooth.
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"!

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

Net carbs	Protein	Fat	Calories
Tomato purée (paste, unsweetened)
0.6 g	0.1 g	0 g	3 kcal
Apple cider vinegar
0 g	0 g	0 g	0 kcal
Onion, brown (yellow), raw
0.1 g	0 g	0 g	1 kcal
Garlic, fresh
0.1 g	0 g	0 g	0 kcal
Allspice, dried, spices
0 g	0 g	0 g	0 kcal
Cloves, spices
0 g	0 g	0 g	0 kcal
Stevia extract (SweetLeaf or NuNaturals, natural low-carb sweetener)
0 g	0 g	0 g	0 kcal
Erythritol (natural low-carb sweetener)
0 g	0 g	0 g	0 kcal
Salt, sea salt
0 g	0 g	0 g	0 kcal
Pepper, black, spices
0 g	0 g	0 g	0 kcal
Water, still
0 g	0 g	0 g	0 kcal
Total per serving, 1 tbsp/ 15 ml
0.9 g	0.2 g	0 g	5 kcal

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Safi 3 months ago #

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.

Martina @ KetoDiet 2 months ago #

Thank you Safi! ❤

Melanie York 2 years ago #

How long does it last thanks

Martina @ KetoDiet one year ago #

I keep mine for up to a month.

Lily (https://www.codigeeks.com/) 2 years ago #

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.

Andi 2 years ago #

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!

Martina @ KetoDiet 2 years ago #

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

Kate Wagner 2 years ago #

Made this today - yummo! Thanks for sharing ☺

Diane 2 years ago #

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! 😊

Kim 2 years ago #

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

Hi Kim, "calories" are listed as kcal.

Whitedove 2 years ago #

Tomatoe puree or paste

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

Tessa 2 years ago #

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" 😊

Melana 3 years ago #

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.

Aline 3 years ago #

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.

Philip 3 years ago #

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

Martina @ KetoDiet 3 years ago #

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

Josephine 3 years ago #

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

Elle 3 years ago #

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! 😊

Michelle 4 years ago #

For how long does this stay good in the refrigerator?

Martina @ KetoDiet 4 years ago #

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.

Evelyne 4 years ago #

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!

Cathy Schwanke 4 years ago #

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!

Felicity 4 years ago #

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!!

stiopa 4 years ago #

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 😊

Jay and Shandell 4 years ago #

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

Malin Andersson (http://godmatintenyttig.se/) 4 years ago #

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!

Leah 5 years ago #

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

Martina @ KetoDiet 5 years ago #

Hi Leah, I will - thanks for the feedback. I use a water bath canning method: http://www.freshpreserving.com/tools/waterbath-canning

mr zorr 5 years ago #

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.

Rebecca J 5 years ago #

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! 😊

Ziv (http://goodorbad.me/) 5 years ago #

Hi Martina. Wow. This looks like a cool thing to try – making your own ketchup from the finest ingredients and also Paleo compatible. Thanks!
For those of us that haven’t got the time to do this on a regular basis, though, I suggest you don’t use heinz ketchup. Apparently it’s one of the worst brands of ketchup.
You can read all about it here – you too, Martina! http://www.goodorbad.me/heinz-ketchup-vs-organic/
Thanks! P.S. real nice looking blog you got here. I'll browse around now...

Thank you Ziv! I totally agree with you, I actually don't buy pesto, ketchup, mayo, mustard, etc. - I prefer to make all of these on my own 😊 And thanks for the useful information!

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Theresa 6 years ago #

Oh I love this! Made you mustard last time, now going to make your ketchup and BBQ sauce 😊

Martina @ KetoDiet 6 years ago #

Thank you Theresa!

Katherine 6 years ago #

I make my own ketchup all the time but with slightly different ingredients. Love the simplicity of this one and that it's done in 10 minutes. Mine takes 2-3 hours! I'll have to give it a try 😊

Thank you Katherine! I sometimes make ketchup from scratch too (with tomatoes) but it does take a bit longer 😊

Mark Barker 4 years ago #

Hi Martina, love the app and recipes. Hard to find organic tomato purée. My first batch worked great stewing canned tomatoes then adding tomato paste to thicken it up. The ingredients on purée is tomato paste and water. What would you do in my situation to avoid the time in stewing? Have you used paste, if so how much water? Thanks again!

Thank you Mark! You can use tomato paste - I believe it's the same thing as tomato puree. If it' too thick, add a 1-2 tablespoons of water.