1Place water in stainless steel saucepan. Add sugar and blackberries and boil on medium for 10 min. Then reduce heat lower and stir periodically.
(Optional: you can remove seeds through a fine wire-mesh strainer into a medium saucepan, using back of a spoon to squeeze out the juice. Although I leave the berries in tact seeds and all.)
2At the point where water is low, add jam and continue to stir into a nice consistency for syrup. Wait till cool then place in glass jar and refrigerate.
Enjoy on toast, muffins, cakes or ice cream.