Canned Diced Tomatoes

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Several people have told me they are afraid to can tomatoes. Whether it’s woes about water bath versus pressure canning or the lengthy process of boiling, blanching, peeling and dicing them, it’s not OK to let yourself be intimidated by a round, red object! Stand up to the tomato and say I WILL CAN YOU!

Okay, maybe you don’t need to do that. But if it makes you feel better, go with it.

Canning Diced Tomatoes - Solid Gold Eats


I picked up yet another box of canning tomatoes at the farmer’s market, this one being 5lbs for 5 bucks. You just can’t beat that deal. My garden has produced a steady one tomato per day, so I added four small ones out of my garden to this collection.

What? I thought you hated tomatoes and only ate them in forms of ketchup??

It’s true – I’m not a big fan of these juicy, mushy things. Over the past 5 years the taste has started to grow on me, but I’m still not one to pick up a tomato and eat it as is. I’d rather add tomatoes and their juices to a pot of chili or pulverized and creamed in a soup. Therefore it seemed purposeful to dice them up and can with their juices.

The recipe I used was modeled from Food in Jars: Preserving in Small Batches Year-Round (affiliate link) but has changes to the process based on my experience. Based on the available tools in my kitchen, some things had to be altered.

Here is a condensed breakdown for seasoned canners:

  1. Core tomatoes and slice an X in one end for easy peeling
  2. Blanch them for 2 minutes, then peel the skin off.
  3. Dice tomatoes.
  4. Boil tomatoes and simmer 35 minutes.
  5. Sterilize pint jars.
  6. Place 2 tablespoons lemon juice in each sterilized jar.
  7. Ladle diced tomatoes into each jar, leaving 1/4 inch headspace.
  8. Process in a water bath for 35 minutes.

Interested in more canning recipes? Check out my Dill Cucumber Relish, Garden Fresh Jalapeno Relish or Beer Pickled Jalapenos!

Canned Diced Tomatoes

Makes 4-5 pints


  • 6 lbs tomatoes, any kind and any size
  • Bottled lemon juice
CANNING NOTES: Food in Jars asks for you to sterilize your jars right off the bat. After reading through the recipe, I realized I needed 35 minutes to cook down the tomatoes AFTER I blanched, peeled and diced them. It would take about 15-20 minutes to boil the water, prepare the ice bath and blanch the tomatoes in batches, and sterilizing jars 55+ minutes in advance would mean they’d cool before I could put the tomatoes in them. Jars need to be hot when you add piping hot food to them. Unless the author has some secret jar warmer I don’t know about (which could be putting them in the oven under 200 or something), work on the tomatoes first, jars second.
STEP 1: Core the tomatoes and slice a shallow X in the opposite end. Fill a large pot (5 qt or more) with water and bring to a boil. Fill a large bowl with water and ice for blanching and set aside.
STEP 2: Once the water is boiling, plop in 2 or 3 tomatoes for 1-2 minutes. It doesn’t take long for the hot water to work the peel off, so don’t let them sit too long or you’ll have a mushy tomato that is impossible to chop. I used a wide slotted fry-basket spoon to pull tomatoes out and drop them in the ice water. This stops the cooking process and keeps the tomatoes firm. Continue this process until all tomatoes have been blanched.
STEP 3: Grab a large baking sheet and set a smaller cutting board inside it. Grab a tomato and pull the peel off. Dice the tomato carefully and then scrape the tomato and its juices back into the large pot that you blanched them in. The baking sheet will keep the juices from running all over the place and they can be easily thrown back into the pot.
STEP 4: Bring the tomatoes to a boil and then simmer for 35 minutes. The tomatoes will cook down and the juices will thicken, leaving behind the perfect consistency.
STEP 5: While your tomatoes boil, sterilize your pint jars. Using a funnel, ladle the tomatoes into each jar, leaving 1/2 inch headspace. Top with 2 tablespoons bottled lemon juice and, with a chopstick or end of a wooden spoon, push tomatoes down into the jar to let out air bubbles and mix the lemon juice into the tomatoes.*
STEP 6: Wipe rims, top with lids and screw bands on until fingertip tight. Process in a boiling water bath for 35 minutes. This part kind of sucks because the steam billows out of the pot and the house gets super hot. I don’t have a lid for the pot I can food in, so the steam goes up and everywhere. The water will boil off, so you’ll need to add more to it through the process. To properly can, the water needs to be 2 inches above the tops of the jars. (Since then, I’ve bought a fan to cool the kitchen!)
I had enough tomato mixture to can another pint, but since I knew I was making chili the next day I just threw them in a jar and put them in the refrigerator. Depending on the juice to flesh ratio of your tomatoes, you may have 5 pints instead of 4. Totally acceptable.
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