Easy Homemade Ketchup in the Slow Cooker + DIY in the Kitchen

13 Reviews / 4.5 Average
Melanie Zook, MA, RD, author of The DIY Kitchen Cookbook and blogger behind Fresh Start Nutrition, is sharing her homemade recipe for ketchup in the slow cooker. Many people are pretty loyal to their ketchup brand, so she knew this recipe would be a tough one to develop. But her Heinz-loving husband from Pittsburgh approves. I hope you do too!
↓ Jump to Recipe
Easy Homemade Ketchup in the Slow Cooker + DIY in the Kitchen on 100 Days of #RealFood

Want to Save this Recipe?

Enter your email below & we’ll send it straight to your inbox. Plus you’ll get great new recipes from us every week!

Save Recipe

This is a guest post by Melanie Zook, MA, RD, LDN. She is the blogger behind Fresh Start Nutrition where she offers wellness classes, workshops, pantry makeovers, and nutrition consultations. She lives here in the Charlotte, NC area, and I thought you all would enjoy her homemade ketchup recipe from her new DIY Kitchen Cookbook!

Hi there, I’m Melanie, and I think the kitchen is the perfect place to do it yourself (DIY).

Why DIY in the kitchen?

  • YOU are in control.
    You know exactly what’s going into your food – no preservatives or artificial flavors, colors, or sweeteners, just whole, clean, healthy foods instead of processed foods that are full of unnecessary additives.
  • You’ll save time and money, as well as space in your pantry and refrigerator.
    Once you stock up on the ingredients you’ll need for a DIY kitchen, you won’t have to buy as many premade staples and you can save yourself the extra errands. Spend some time putting together the make-ahead mixes and you’re done.
  • It’s green.
    You can skip the excess packaging of premade, processed foods.
  • It’s worth it to make some of your meal and snack staples.
    They take a matter of minutes using ingredients you probably already have on hand. (But some DIY recipes out there just aren’t worth the time and hassle if you can already find affordable clean versions in the store.)

These reasons are exactly what inspired me to put together my new DIY Kitchen Cookbook*It covers how to Make Your Own Clean & Healthy Make-Ahead Mixes, Seasoning Blends, Snacks, Breakfasts, Condiments, Dressings & Drinks with copycat recipes that are cleaner, healthier, and more budget-friendly versions of what you’d normally buy in a grocery store. The recipes are designed so you can tweak them to fit your family’s preferences or swap out ingredients to make them allergy friendly.

Homemade Ketchup in the Slow Cooker

Easy Homemade Ketchup in the Slow Cooker + DIY in the Kitchen on 100 Days of #RealFood


Let’s start with ketchup. It’s a kid-friendly kitchen, restaurant, and picnic staple, but the bottled, store-bought version is one of the condiments highest in sodium and sugar (often in the form of high fructose corn syrup). And some of the new reduced sugar varieties are made with artificial sweeteners. By making your own, however, you can control how much salt is added and skip the processed sugar altogether by using honey as the sweetener.

Easy Homemade Ketchup in the Slow Cooker + DIY in the Kitchen on 100 Days of #RealFood

Homemade ketchup makes a perfect summertime hostess gift. Double the recipe, pour into mason jars, and tie on a bow.

It also freezes well (leave headroom if freezing in jars to allow for expansion). Or freeze in an ice cube tray so you can thaw out individual portions when you need them for serving food or when making other recipes, such as barbecue sauce.

(*FYI – You do not need a Kindle device to download and read this ebook. FREE apps for just about any desktop, smartphone, or tablet are available on Amazon or in your gadget’s app store.)

Posts may contain affiliate links. If you purchase a product through an affiliate link, your cost will be the same but 100 Days of Real Food will automatically receive a small commission. Your support is greatly appreciated and helps us spread our message!

About The Author

134 thoughts on “Easy Homemade Ketchup in the Slow Cooker + DIY in the Kitchen”

Leave a Comment

Your email address will not be published. Required fields are marked *

Recipe Rating

  1. 4 stars
    I made faux Alfredo sauce tonight. Garlic, Parmesan cheese, vegetable broth, cooked cauliflower in blender until creamy. Served over spaghetti squash with peas and sautéed mushrooms.

  2. 4 stars
    This looks like a great recipe and I chose it to use as a start up recipe. I made my changes to suit our tastes. I subbed honey for reg corn syrup and added about 1/3 cup sugar. I also added more salt, black pepper and cayenne pepper. I decided not to use my slow cooker and added one can of tomato paste and simmered for about 30 minutes. All the other spice measurements were spot on. Thanks for sharing your recipe.

  3. 5 stars
    Thanks for the recipe. I personally liked the taste of the ketchup and I’m not one to use it. Now the Heinz lovers didn’t care for it. I do have to mention that you should cook it on low in the Crock-Pot for 8 hours with the lid off. I did the recipe exactly the way it said to and it was still soupy because the steam built up inside the lid and poured back down into the ketchup. I then took off the lid and cooked it on low for 8 hours and it came out to a perfect consistency. I do advise stirring this mixture occasionally so you don’t get a crusty build up around the edges.

    sionally so you don’t have a crusty build up around the edge.

  4. I just made this, and had it in my crockpot on low for 10 hours but it was still pretty thin. It was also darker, had a saucy consistency, and had a very strong tomato sauce + vinegar taste. :(

  5. 5 stars
    Store-bought ketchup tastes like chemicals and sugar to me, so I’ve been on a mission to make my own. I’ve tried several recipes! This is my current favorite. Thank you! I cook it on high for 8 hrs with no top on the CP to get it to the consistency I like. YUMMY! My family loves it.

  6. I have to watch my salt. What could I substitute for tomato paste as it is high in sodium. I would have to leave out the salt also in the recipe and use celery seed not celery salt. I can’t wait to try it. I have only found on version of no salt ketcup and only one store sells it. Can’t wait to have my own. Thanks!

    1. I’ve kept it in my fridge at times for at least a month with no problems. To avoid waste, though, I usually double a batch, then freeze it in pint or quart sized jars (leave headroom), then thaw out a jar to refill a squeeze bottle as needed.

    1. Hi Hannah–I’m in no way a canning expert, but I don’t see why not? But I have only ever frozen it, not canned it. There have been a lot of other canning comments on this post, so I wonder if anyone else has tried it!

    2. I would be concerned with canning because of the honey in it. I am not an expert but have canned and pressure canned many times, and I believe honey is one ingredient that is not supposed to go in a canning recipe. You could check the USDA website on canning to be sure!

  7. What a good idea! I would think so, but to be extra safe, you could freeze the jars then they’d thaw out by that time, all while keeping it chilled. Hope they love their gift!

    1. Hi Val–I haven’t tested it that way, but it sounds like some readers planned to make it with fresh tomatoes. You can see some of the info in their comments. Overall, it sounds like you would need to skin them as you would for other tomato products, then add more cook time to cook off more liquid (water). Let us know how it goes!

    1. I’ve kept it in my fridge at times for at least a month with no problems. To avoid waste, though, I usually double a batch, then freeze it in pint or quart sized jars (leave headroom), then thaw out a jar to refill a squeeze bottle as needed.