Rating: 4.68 stars
149 Ratings
  • 5 star values: 113
  • 4 star values: 27
  • 3 star values: 7
  • 2 star values: 1
  • 1 star values: 1

This ketchup does come close to those name brands in terms of taste, texture and color. I've never had a tomato paste-based ketchup that I liked, so I decided to cook down crushed tomatoes instead. By using the slow cooker, we take most of the labor out of the process.

Recipe Summary test

prep:
10 mins
cook:
12 hrs
total:
12 hrs 10 mins
Servings:
48
Yield:
3 cups
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Ingredients

48
Original recipe yields 48 servings
The ingredient list now reflects the servings specified
Ingredient Checklist

Directions

Instructions Checklist
  • Pour ground tomatoes into slow cooker. Swirl 1/4 cup water in each emptied can and pour into slow cooker. Add sugar, vinegar, onion powder, garlic powder, salt, celery salt, mustard powder, black pepper, cayenne pepper, and whole clove; whisk to combine.

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  • Cook on high, uncovered, until mixture is reduced by half and very thick, 10 to 12 hours. Stir every hour or so.

  • Smooth the texture of the ketchup using an immersion blender, about 20 seconds.

  • Ladle the ketchup into a fine strainer and press mixture with the back of a ladle to strain out any skins and seeds.

  • Transfer the strained ketchup to a bowl. Cool completely before tasting to adjust salt, black pepper, or cayenne pepper.

Nutrition Facts

16 calories; protein 0.5g; carbohydrates 3.9g; sodium 139.1mg. Full Nutrition
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Reviews (143)

Most helpful positive review

Rating: 5 stars
01/31/2014
Wow! This recipe came out great. I have two little kids and wanted to make a ketchup without high fructose corn syrup, and to use in our homemade BBQ and sloppy joe sauces. It tastes just like the bottled stuff. I skipped the white sugar & put in 1/3 c of honey instead, to make it even less processed. Canned crushed tomatoes made it easier to strain at the end, and the consistency is pretty good. I would skip the added water next time when using the honey. This is a keeper! I'm so excited that I found this recipe & it was so easy using the slow cooker. Read More
(159)

Most helpful critical review

Rating: 3 stars
09/03/2014
I had a variety of different kinds and put them all together. Cut the stem ends off, cut them up and liquefy them, skins, seeds and all. Cooking it in a crockpot for 10 hours, and having to stir every hour pretty much defeats the reason for using a crockpot. I made a batch last night, but cooked it on the stove. You have to pay attention to it, and stir every few minutes, but from the time I started chopping to the time it reduced, it was just over an hour. I did use ground clove, and made a few adjustments, but I can say that it does have a great flavor. Read More
(32)
149 Ratings
  • 5 star values: 113
  • 4 star values: 27
  • 3 star values: 7
  • 2 star values: 1
  • 1 star values: 1
Rating: 5 stars
01/30/2014
Wow! This recipe came out great. I have two little kids and wanted to make a ketchup without high fructose corn syrup, and to use in our homemade BBQ and sloppy joe sauces. It tastes just like the bottled stuff. I skipped the white sugar & put in 1/3 c of honey instead, to make it even less processed. Canned crushed tomatoes made it easier to strain at the end, and the consistency is pretty good. I would skip the added water next time when using the honey. This is a keeper! I'm so excited that I found this recipe & it was so easy using the slow cooker. Read More
(159)
Rating: 4 stars
04/16/2014
I do a couple things just a little differently. I made a gallon, and froze the extra. Let me say that my Favorite Ketchup by Far- is the recipe for fermeted ketchup in Nourishing Traditions. It's EASY and tastes better than anything you can fathom when thinking Ketchup. But I hate to cook a fermented food and I needed a cookable Ketchup for BBQ Sauce. So- I made this, and it turned out great- but I carried over some ideas from my favorite Ketchup. To the Gallon I used 1/2 cup Fish Sauce, skipped the clove, and used 1 cup honey in place of 2 cups sugar. I used some red wine and some white wine vinegar (just because it's what I had)- it turned out as good as Heinz, and Almost as good at the Fermented stuff I make from NT. Good stuff- no corn syrup, no junk. Also, if you used strained tomatoes you don't have to strain when you're done. Just put all the ingredients in the crock pot, leave the lid off and it's done in a few hours. Worth it- as long as you make a lot and freeze the extra. Read More
(73)
Rating: 5 stars
05/20/2013
This turned out great! I used minced green onions, garlic, and celery instead of the garlic powder, onion powder, and celery salt. I didn't puree it because I kind of like the chunky consistency. I think next time I will try peeled pureed tomatoes and cut the sugar a bit. All in all, easy and delicious! Read More
(57)
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Rating: 4 stars
06/19/2014
I have a question ( I have not yet tried this recipe). Could this be made in large amounts and then "canned" in a water bath like other veggies and fruits. I would love to make a big batch of this to keep on my pantry shelves for future use. Thanks for any suggestions. Read More
(41)
Rating: 5 stars
07/03/2013
This reminds me of really good BBQ sauce! It was very sweet. I would like to also try it with less sugar. I used a saucepot instead which sped up the cooking process so I don't know what difference that made. You could get away without peeling the skin and straining the mixture. It would just be chunky if you like that texture. Read More
(33)
Rating: 3 stars
09/03/2014
I had a variety of different kinds and put them all together. Cut the stem ends off, cut them up and liquefy them, skins, seeds and all. Cooking it in a crockpot for 10 hours, and having to stir every hour pretty much defeats the reason for using a crockpot. I made a batch last night, but cooked it on the stove. You have to pay attention to it, and stir every few minutes, but from the time I started chopping to the time it reduced, it was just over an hour. I did use ground clove, and made a few adjustments, but I can say that it does have a great flavor. Read More
(32)
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Rating: 5 stars
10/01/2013
Chef John loved your video! I too am one more fool by making homemade ketchup, and I must say I'm sure glad I did it with your recipe. I used my own homegrown tomatoes, mashed and strained them with my "Sauce Master" so I simply measured 28oz twice (8 cups) then doubled that as I had 30 cups of puree to use up. Spices & seasonings are just right. Thanks again Chef John! Now at least I can say I've made h/m ketchup lol. Read More
(30)
Rating: 4 stars
11/03/2014
First a quick note: if you are considering this for the first time and are looking at your standard-size cans of tomatoes: the recipe does call for 56 oz of canned tomatoes (so 4 regular size or 2 large size). Pretty spot on ketchup flavor, my kids were surprised when they tasted it. I did make some adjustments/changes 'though. I used brown sugar and used a little less, I used cider vinegar instead of white, used 1t of garlic powder instead of 1/2, cut back the salt to 1t and used maybe 1/16t (or just a dash) of ground cloves and added 1T of oyster sauce (fish sauce would also work). My wife despises seafood, but she has no idea there is oyster sauce in it. I don't often cook from recipes, preferring to learn the whys and hows, and I think this recipe gives you a great sense of the ratio of tomato:sugar:acid to start with. And cooking in the crock pot was slooooow, but allowed me to do other things on my day off. I agree with others and if I wanted it done faster I would do it on the gas an pay attention to it. Read More
(30)
Rating: 5 stars
05/24/2014
Thank you for this fantastic recipe! I've been looking to provide my family with heart healthy options in the way of ketchup (we love our ketchup)! Have tried many and have not been able to consume more than the first few bites of any of them! I made this less than a month ago and we are on our last few drops! I did make a few changes: swapped out the white sugar for 1/2 the amount in Truvia, crushed tomatoes instead of ground, Pink Sea Salt crystals for the table salt, and finally... left out the celery salt only because I didn't have it on hand nor find it anywhere to buy (didn't even know it existed). Got started late in the day; forgot about it cooking in the slow cooker (thankfully on low) and went to bed. Woke up Sunday morning to the most fantastic aroma wafting throughout my house! UNTIL I realized... OMG! MY KETCHUP! It turned out great though! Making second batch with the changes above and found the celery salt! Thank you so much for your hard work in putting this together for all of us to enjoy! Read More
(22)