I haven't done much preserving before but I found these plastic preserving tops that were super easy to use, and worked great with this simple yet delicious recipe.
Place the blackberries in a large saucepan then add the pectin a little at a time while stirring constantly.
Heat the blackberries on high while stirring constantly until they come to a full boil. Add the sugar all at once.
Bring back to a full hard boil then and allow to boil like this for 1 minute.
Remove from heat and ladle into clean, hot 125ml jars, leaving 1/2cm space at the top.
Wipe the rim of the jar and put plastic preserving covers on as per manufacture's instructions.
Remove and set them upright on a tea towel for 12 hours before storing in a cool dark place.
Jelly: To make jelly basically means to remove all the seeds and similar to create a smooth, clear like jam. To do this simply strain the hot jam through a sieve before placing in the jars.