Add blackberries and lemon juice to a medium saucepan.
Heat over medium heat, breaking down berries with a spoon, spatula or potato masher as they cook.
Once fruit is bubbling, cook for an additional 5-7 minutes until juices are slightly reduced.
Remove from heat. Stir in honey and chia seeds. Allow to cool/thicken for at least 10 minutes before transferring to a jar for storage.
Notes
Nutrition facts are based on about 2 cups of blackberry chia jam. Note that your final yield will depend on berries and amount of moisture lost while cooking.