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a jar of homemade blackberry jam on a grey table.

Blackberry Jam without Pectin

Ever wonder what to do with all those blackberries that come into season during summertime? Well, here's a recipe using blackberries and some simple ingredients to create delicious homemade blackberry jam without pectin!
Course Breakfast, Brunch
Cuisine American
Prep Time 5 minutes
Cook Time 10 minutes
Cooling Time: 1 hour
Total Time 1 hour 15 minutes
Servings 10 serves
Calories 106kcal
Author Peter G


  • 250 grams blackberries fresh or frozen
  • 220 grams sugar white
  • 180 ml water
  • 1 lime juiced
  • 20 grams corn starch


  • Combine the berries, 120 ml (½ cup) water, sugar and lime juice in a pot over medium heat.
  • Allow the mixture to come to a boil and cook for about 10 mins.  The berries will have softened, and everything will be a lovely deep red colour. Using a spoon, remove any excessive foam that may have formed on the surface.
  • Using a fork or potato masher, mash the berries thoroughly.
  • Whisk the corn starch with the remainder of the water in a separate bowl to make a slurry. Add the corn starch slurry to the berries mixture and stir vigorously.
  • Turn up the heat to high and cook for a couple of minutes, continuing to stir (be careful of the splatters!) and allow the blackberry jam to thicken.
  • Remove from heat and cool completely before storing in a sterilized jar.


  • Make sure your blackberries are ripe before adding them to the jam. Ripe berries will give off more juice than unripe ones.
  • Use a large enough pot so that you can boil the jam without burning yourself. A small one won't be able to hold the heat well.
  • When you're done stirring the jam, let it sit for at least 10 minutes before transferring it to jars. This allows the flavours to mingle together.
  • Sterilize your jars by running them through the dishwasher and allowing them to dry.  Alternatively, wash them in hot, soapy water, rinse them and allow them to dry before using.
  • After transferring the jam to jars, cover each jar with a lid and store them in a cool place until ready to eat.

Blackberry Jam Variations

  • Instead of using plain water, you can add ½ cup of white wine to the mix. This will enhance the flavour of the jam. Also, I like adding a little Chambord to enhance the flavours.
  • For a sweeter version of this jam, replace half of the sugar with honey.
  • Try adding cinnamon sticks or ground cinnamon or vanilla bean seeds to the jam for an extra kick of flavour.  
  • You can also add apples to this jam to make apple blackberry jam. For this recipe, try adding a whole grated apple. 
  • Try adding chopped peaches or plums to this jam - these fruits will add a slight tartness.


Serving: 1serve | Calories: 106kcal | Carbohydrates: 27g | Protein: 1g | Fat: 1g