Preheat your oven to 160 degrees and line a large loaf tin with baking paper.
Place the eggs, coconut oil, peanut butter, vanilla extract and bananas (which have been quartered) into your Thermomix bowl and mix for 15 seconds on speed 6 to combine.
Add the flour, baking powder, caster sugar, brown sugar and cinnamon to your Thermomix bowl and mix for 10 seconds on speed 4.
Scrape down the sides of the bowl and mix for a further 5 seconds on speed 4.
Pour the mixture into the prepared tin and bake for 55 minutes or until the banana bread is golden on top and cooked through when tested with a skewer