- 450gblackberries, fresh
- 450gwhite cane sugar
- 1lemon, juiced
- Place the blackberries and lemon juice in a large pan and simmer gently for about 15 minutes until the fruit is soft
- Meanwhile, warm the sugar in a low oven. When the fruit is cooked, add the sugar and stir the sugar and fruit over a low heat until the sugar has dissolved
- Turn the heat up and bring the fruit and sugar to a boil, boil for 10–15 minutes until setting point has been reached (see setting point testing notes above)
- Once setting point has been reached, take the pan off the heat, spoon any scum off the top of the jam and leave to sit for about 10 minutes
- Ladle the hot jam into warm, sterile jam jars and seal immediately with a screw-top lid. Label once cold