Mash bananas with a fork in a bowl until there are no/minimal lumps.
Sift flour, baking powder and cocoa into a large bowl and add salt.
In a jug, beat eggs and vanilla together.
Adds eggs and bananas into dry ingredients and stir until well combined.
Pour into a loaf tin lined with parchment paper
Bake for 35 minutes, or until cooked through (note 3)
Cool in tin, then turn out onto a wire rack to fully cool down.
Notes
note 1 - coconut oil is found in most supermarkets and health food stores. I haven't tried an alternative oil.note 2 - again, maple syrup can be found in health food stores and supermarkets. You could always substitute this for brown sugar, or cane sugar however I haven't tried this either. note 3 - to test is a cake/loaf is cooked, insert a clean skewer or knife into the centre or thickest part. If it comes out clean it is cooked. If you are finding the edges are burning, cover your banana bread with foil and cook further.