Canning Roasted Tomatoes

Canning Roasted Tomatoes

The Spruce / Julia Hartbeck

Prep: 20 mins
Cook: 35 mins
Canning time: 85 mins
Total: 2 hrs 20 mins
Servings: 4 servings
Nutrition Facts (per serving)
41 Calories
0g Fat
9g Carbs
2g Protein
Show Full Nutrition Label Hide Full Nutrition Label
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Nutrition Facts
Servings: 4
Amount per serving
Calories 41
% Daily Value*
Total Fat 0g 1%
Saturated Fat 0g 0%
Cholesterol 0mg 0%
Sodium 12mg 1%
Total Carbohydrate 9g 3%
Dietary Fiber 3g 10%
Total Sugars 6g
Protein 2g
Vitamin C 32mg 158%
Calcium 23mg 2%
Iron 1mg 3%
Potassium 542mg 12%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

Canning tomatoes is a great way to preserve this summer fruit to enjoy year-round. Roasting tomatoes before canning intensifies their flavor and prevents the pulp and liquid from separating, as often happens with raw-pack home-canned tomatoes. It's an extra step in the canning process of this delicious garden produce, but the results are worth it.

This recipe is for one pint of home-canned roasted tomatoes, but you can make as many pint jars as you wish simply by increasing the ingredient proportions. A really good tomato to use is the Roma because it has thicker, meatier walls and less water, which means thicker sauce in less cooking time. If you are canning in a water bath, make sure to include the acid, as is not for flavoring; you need the additional acid to safely can the tomatoes without a pressure canner. Directions for canning under pressure also are given.

Ingredients

  • 2 pounds tomatoes (washed, stemmed, and dried)

  • 1 tablespoon lemon juice (or vinegar or 1/4 teaspoon citric acid)

Steps to Make It

Note: While there are multiple steps to this technique, this process is broken down into workable categories to help you better plan for preparation and canning.

Roast the Tomatoes

  1. Gather the ingredients.

    roasted tomatoes ingredients

    The Spruce / Julia Hartbeck

  2. Preheat broiler. Cut washed, stemmed, and dried tomatoes in half vertically (from stem end to blossom end).

    tomatoes cut in half on a cutting board

    The Spruce / Julia Hartbeck

  3. Arrange tomato halves cut-side down in a single layer on a rimmed baking sheet.

    Arrange tomato halves cut-side down in a single layer on a rimmed baking sheet

    The Spruce / Julia Hartbeck

  4. Place under broiler and broil until tomatoes are wrinkled and starting to show black spots, but are not burnt, 3 to 5 minutes. Alternatively, oven roast tomatoes at 450 F for about 30 minutes.

    roasted tomatoes on a baking sheet

    The Spruce / Julia Hartbeck

  5. Remove from broiler (or oven) and, when tomatoes are cool enough to handle, rub off skins. Don't worry about getting every last bit of skin off.

    tomatoes with with the skin removed on a baking sheet

    The Spruce / Julia Hartbeck

  6. Squish out most of the seed gel, but again, don't worry about getting every last seed out. Chop tomatoes, if desired.

    roasted tomatoes on a baking sheet

    The Spruce / Julia Hartbeck

Prepare the Canning Jars

  1. While tomatoes are roasting, prepare jar and water bath by placing jar in boiling water for 10 minutes.

    jar in a pan with water

    The Spruce / Julia Hartbeck

  2. Sterilize lid and band in a small pot of almost-boiling water for 5 minutes, turn off heat, and let them sit in water until ready to fill jar.

    jar lid in a pan with water

    The Spruce / Julia Hartbeck

  3. Fill a water bath canner half-full with water and start heating it with lid on.

    water bath canner pot

    The Spruce / Julia Hartbeck

  4. Pack tomatoes into a clean, sterilized, 1-pint canning jar. Add lemon juice or vinegar, sprinkling it in as you pack in tomatoes.

    roasted tomatoes in a jar

    The Spruce / Julia Hartbeck

  5. Press down on tomatoes with back of a spoon to release any air bubbles. Leave 1/2-inch headspace between tomatoes and rim of jar.

    roasted tomatoes in a jar

    The Spruce / Julia Hartbeck

  6. Using tongs or a magnetic wand lifter, remove lid from hot water and place on top of jar.

    lid on a jar with tomatoes

    The Spruce / Julia Hartbeck

  7. Again using tongs, remove band and screw on snugly, but not all the way.

    jar with tomatoes with a lid on top

    The Spruce / Julia Hartbeck

Process the Tomatoes

  1. Place jar in boiling water bath, making sure they are covered by 1 to 2 inches of water. Keep in boiling water for 85 minutes (adjust canning time if you live at a high altitude).

    jar with tomatoes in a canner

    The Spruce / Julia Hartbeck

  2. Using tongs, or a canning jar grabber, carefully remove jar from water bath and set on a clean towel on a flat counter. Listen for the popping sound, which indicates a good vacuum seal. You can remove the ring if you like, or loosen it quite a bit so it doesn't rust in place due to trapped moisture.

    canned roasted tomatoes jar on a towel

    The Spruce / Julia Hartbeck

  3. When jar has cooled completely, check that it is sealed by pressing the center of lid. If it pops up and down and/or makes a popping sound, it is not sealed; unsealed jars should be placed in the refrigerator immediately and use within one week. When the sealed jars are completely cool, store in a dry, dark, cool place for up to one year. If you see tomatoes floating above a layer of liquid, that's normal. Tomatoes have a lot of water in them and will separate, which is more visible in a glass jar than in a commercial can.

    Roasted Tomatoes in a jar on a towel

    The Spruce / Julia Hartbeck

Tip

You can roast the tomatoes the day before canning if you prefer. Store in an airtight container in the refrigerator.

Glass Bakeware Warning

Do not use glass bakeware when broiling or when a recipe calls to add liquid to a hot pan, as glass may explode. Even if it states oven safe or heat resistant, tempered glass products can, and do, break occasionally.

Recipe Variations

Home-canned roasted tomatoes are delicious as they are, but they can be amped up if desired.

  • Before roasting, sprinkle the tomatoes with 1 to 2 teaspoons of dried, crushed herbs like rosemary, thyme, and basil.
  • Add 1 tablespoon sugar to each pint jar to offset an aggressive acid taste. 
  • Add 1/2 teaspoon salt to each pint jar if desired.

How to Pressure Can Roasted Tomatoes

Tomatoes are acidic enough so they can be preserved in either a boiling-water bath or pressure canner, but low-acid fruits, vegetables, and meats need pressure canning. Pressure can roasted tomatoes this way:

  1. Start with a clean pressure canner. Place the rack plate on the bottom and fill it with 4 inches of hot water or follow the directions that came with your unit. Place it on the stove over low heat with the lid off while you roast the tomatoes.
  2. Place the filled jar on the canner rack. If the water is below 3 inches, add more hot tap water to come to that level. Place the pressure canner lid on and twist it into place but leave the weight off or valve open.
  3. Turn the heat to high and let the steam escape through the vent for 10 minutes. Then put the weight on and/or close the valve and let the pressure build to 11 pounds. 
  4. Once the gauge reaches 11 pounds, process for 25 minutes, adjusting the heat as necessary to keep the pressure stable.
  5. When the time is up, remove from the heat and let it cool down until the pressure gauge reaches zero before attempting to open the canner.
  6. Using tongs, remove the jar from the canner and proceed with the directions for water bath canning.