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4.7 from 117 votes

Blackberry Jam - Without Pectin

Store those fresh summer berries in a jam to enjoy all year with this easy, low sugar homemade blackberry jam recipe.

Cook Time
mins
Total Time
45 mins
Servings: 18 oz
Calories: 128 kcal
Course: Condiments

Ingredients

  • 6 cups fresh blackberries
  • 1 tablespoon lemon juice bottled
  • 1 - 1 1/2 cups granulated sugar

Instructions

    Cup of Yum
  1. Add berries, lemon juice, and sugar to a large pot and heat to medium. Use a fork or a potato masher to gently mash down the berries to release some of their jucies.
  2. Heat on medium, bring to a gentle boil, and then turn the heat down to medium-low to simmer. The berries will foam, just stir occasionally to reduce the foam.
  3. Let simmer until the jam begins to gel, or when the temperature of the jam reaches 221° F.
  4. Add to canning jars and can with a water bath or store in fridge or freezer.

Notes

  • The nutritional value is approximately per oz or 6 servings in 1 6 oz jar. 
  • Storage
  • Storage
  • Fridge: Store in an airtight container in the fridge for up to 3-4 weeks. 
  • Freezer: Store in a freezer-safe container and freeze for up to 3 months. 
  • Canning: Use safe water bath canning methods to can and store this jam for up to 1 year in a cool dry place.
  • Substitutions
  • Substitutions
  • Blackberries: You can use frozen blackberries in place of fresh by adding the thawed berries to a bowl with the lemon juice. Let it all macerate (soften) in the lemon juice first and then add to the pot with sugar.
  • Lemon Juice: For this recipe, we prefer to use concentrate to ensure high acidity, which can vary if using fresh lemons.
  • Sugar:  This is a low sugar jam.  While we prefer to use only 1 - 1 1/2 cups of granulated white sugar, you can use up to 5 or 6 for a very very sweet jam.  You can also use up maple syrup or honey, 1 cup for a low sugar jam, or more for a much sweeter jam.
  • Tips
  • Tips
  • Pot: Use a larger pot because the berries will foam as they reduce, to prevent foaming over.
  •  

Nutrition Information

Calories 128kcal (6%) Carbohydrates 32g (11%) Protein 1g (2%) Fat 0.3g (0%) Saturated Fat 0.01g (0%) Polyunsaturated Fat 0.1g Monounsaturated Fat 0.02g Sodium 1mg (0%) Potassium 79mg (2%) Fiber 3g (12%) Sugar 30g (60%) Vitamin A 103IU (2%) Vitamin C 10mg (11%) Calcium 14mg (1%) Iron 0.3mg (2%)

Nutrition Facts

Serving: 18oz

Amount Per Serving

Calories 128

% Daily Value*

Calories 128kcal 6%
Carbohydrates 32g 11%
Protein 1g 2%
Fat 0.3g 0%
Saturated Fat 0.01g 0%
Polyunsaturated Fat 0.1g 1%
Monounsaturated Fat 0.02g 0%
Sodium 1mg 0%
Potassium 79mg 2%
Fiber 3g 12%
Sugar 30g 60%
Vitamin A 103IU 2%
Vitamin C 10mg 11%
Calcium 14mg 1%
Iron 0.3mg 2%

* Percent Daily Values are based on a 2,000 calorie diet.