In a large bowl, mix together the Nutella, skimmed milk powder, coconut flour, almond milk, and vanilla extract until combined. If the mixture seems too dry, add more almond milk, or if too wet, add more flour.
Fold in the chocolate chips, then roll the dough into 12 balls.
Keep in an airtight container in the fridge until ready to eat.
Notes
These balls can stored in an airtight container in the fridge for up to 1 week. They also freeze well for up to 2 - 3 months. Thaw overnight in the fridge before eating.