Preheat the oven to 180C/356F. If you are using frozen bananas, place them= on a lined baking tin to defrost as the oven heats. They don’t need to be cooked, just thoroughly defrosted. Mash the banana bits up a little on the tray.
In a large mixing bowl, combine the flours, baking powder and spices.
Mix the wet ingredients into the dry, stirring to incorporate. Add any vegan mix ins here if you're using them.
Pour the mixture into a silicon loaf pan that is sitting on a baking tray. This makes it easier to keep even and steady. Cook for around 40 minutes, or until the top is perfectly golden. If a skewer doesn't come out clean, cover with foil and continue to cook for another 10-15 minutes, or until cooked through. Allow to cool a little in the loaf pan before transferring to a wire rack to cool.