Add blackberries to a pan over low heat. Cook until soft and berries release thier juice. About ten minutes for fresh berries.
Crush blackberries using a spoon or fork and mix together again. Use immersion blender if you want it smoother.
Add Chia seeds and mix. Allow to cool before putting the jam in a jar.
You can freeze this jam for up to two months if you need to. Double or triple the recipe to make it worth your time.