Add the sunflower seeds to the Thermomix bowl and mix for 7 sec/speed 9.
Add the remaining ingredients and mix for 10 sec/speed 7 until the mixture sticks together. It's important not to over-mix or the dates will become too sticky to work with.
Take roughly a tablespoon of the mixture and roll it into a walnut-sized ball with your hands. Continue doing this until all the mixture is used. If the mixture is a little sticky to roll, place the Thermomix jug with the mixture in it in the fridge for 15 minutes to harden.
Rolling the bliss balls in extra cocoa powder and chia seeds gives them a lovely finish, but they can also be left plain.
Notes
Medjool dates: Weigh the Medjool dates after they have been pitted. I generally use between 12-14, but they vary in size and weight.Storage: To store, keep them in the fridge for up to one week in an airtight container.