In a blender grind walnuts into almost a flour. Leave a tiny bit for texture. Add in the dates and process/blend until combined and smooth. You may need to stop and scrape down the sides or use a tamper.
Scrape the mixture into a bowl and add in the cacao, hemp hearts and maple syrup. Stir.
Mixture will look wet and sticky. Add in the oats and mix again.
Line a baking tray with parchment paper and place the coconut into a shallow bowl.
Rub some coconut oil on your hands to prevent sticking and portion the mixture into balls rubbing each ball into the coconut until coated and placing it on the parchment paper.
Place the balls in the freezer for thirty minutes to set.