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tomato jam in jars with pineapple and tomato in background.
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5 from 1 vote

Tomato Jam

An easy 4-ingredient Tomato Jam Recipe to help extend tomato season!
Prep Time15 minutes
Cook Time50 minutes
Total Time1 hour 5 minutes
Course: Condiment
Cuisine: Australian
Keyword: tomato jam
Servings: 30 servings
Calories: 91kcal

Equipment

  • heavy based saucepan

Ingredients

  • 1 kg tomatoes
  • ½ pineapple
  • 3 cups sugar
  • ½ teaspoon tartaric acid (or 1 tablespoon lemon juice)

Instructions

  • Place tomatoes in a large bowl and pour boiling water over the tomatoes until they are covered. Leave for 5 minutes and then drain off the liquid and wait until they are cool enough to touch. Peel tomatoes.
  • Chop off skin of pineapple and remove core.
  • Cut tomatoes and pineapple into small cubes (about 12/-1 cm by ½ - 1 cm)
  • Place in a saucepan with 1 cup of the sugar.
  • Place rest of sugar in a baking dish, place in oven and turn heat to 160 degrees celsius (fan-forced) or equivalent.
  • Gently heat the pineapple, tomato and sugar mixture until the sugar dissolves.
  • Turn up heat to medium/high and boil for 20 minutes.
  • Add heated sugar from oven to the mixture and stir in quickly to dissolve.
  • Continue to boil steadily on medium heat, stirring regularly, for 30 minutes.
  • A couple of minutes before taking the jam off the stove, add the tartaric acid and stir to combine.
  • Pour into sterilised jars and seal immediately.

Notes

Peeling tomato skins
Tomato skins should split after being scalded and you should be able to easily peel them off with your hands. If they’re not split, apply a little pressure or cut the skin a little with a sharp knife and then the skin should peel off easily. If using cherry tomatoes, they should just pop out of their skin by applying a little pressure at the base of the tomato.
How to avoid burning your jam
Make sure you stir regularly throughout the process and almost continually towards the end of the cooking time. 
Adjust temperature so jam is boiling steadily rather than rapidly.

Nutrition

Calories: 91kcal | Carbohydrates: 23g | Protein: 0.4g | Fat: 0.1g | Saturated Fat: 0.01g | Polyunsaturated Fat: 0.03g | Monounsaturated Fat: 0.01g | Sodium: 2mg | Potassium: 96mg | Fiber: 1g | Sugar: 22g | Vitamin A: 286IU | Vitamin C: 12mg | Calcium: 5mg | Iron: 0.1mg