Mash the bananas, you want approximately 270g of mashed banana or 1 metric cup.
Grate the zucchini, you want approximately 200g of grated zucchini, which is around 2 metric cups.
Squeeze out the zucchini with your hands to remove as much liquid as possible.
Heat your oven to 180 degrees Celsius (360 F. Prepare a loaf tin, I use a silicone tin so I don't need to line it, if you are using regular loaf tin then you will need to line it with baking paper.
In a medium-sized bowl whisk the oil, eggs, and mashed banana.
Add the sugar and whisk until well combined.
In a second large bowl whisk together the remaining dry ingredients: flours, baking powder, and cinnamon.
Add the wet ingredients to the dry ingredients, fold until just combined.
Fold in the grated and squeezed zucchini.
Transfer the batter into your prepared loaf tin.
Bake at 180 degrees (360 F) celsius for 50-60 mins or until a skewer comes out clean.
Once cooked, remove from oven, allow to cool for 5-10 minutes in the loaf tin before turing out on a cooling rack.