Preheat oven to 180°C (350° F).

Mash the bananas with a fork or in a blender/food processor. In a bowl, whisk eggs, mashed bananas, agave syrup, vanilla extract and melted coconut oil.

Add oat flour, almond flour, baking powder and mix until well-combined.

Mix the cocoa powder with the milk. Divide the batter in two and add the cocoa and milk mixture to one half of it.

Pour both halves of the batter one at a time into greased loaf tin (or lined with parchment paper) and bake for 40-45 minutes.