Heirloom Tomato Ketchup

Heirloom Tomato Ketchup

  • Cook Time

    6 hours on low

  • servings


  • appliance

    Slow Cooker


What You'll Need
  • 3 lbs. any variety heirloom tomatoes, skins and seeds removed
  • 1 28-ounce can San Marzano chopped tomatoes
  • 1 medium yellow onion, peeled and chopped
  • 2 cups apple cider vinegar
  • 1/4 cup brown sugar
  • 1/2 cup molasses
  • 2 teaspoons salt
  • 1 teaspoon cornstarch
  • 1/2 teaspoon each, allspice, clove, black pepper, celery seeds, dry mustard
What To Do
  1. Add the tomatoes, canned tomatoes, onion, vinegar, brown sugar, and molasses to the slow cooker.
  2. In a small bowl, whisk together the salt, cornstarch, allspice, clove, pepper, celery seeds and dry mustard.
  3. Pour the salt mixture into the slow cooker and stir.
  4. Set the slow cooker on low for 6 hours.
  5. Strain the ketchup and let cool before preserving.