Remove pips from the dates and put them in a saucepan on a low heat with enough water to just cover them. Meanwhile mash up the bananas in a large mixing bowl. After 5 mins the dates should be soft, then place in blender / Nutribullet and blend to a paste.
Mix the dates with the bananas.
Add the oats, nut butters & coconut sugar until well combined.
Divide into prepared muffin tins and bake for 20-25 mins.