Preheat your oven to 160 degrees Celsius (fan-forced) and line a large loaf tin with baking paper.
Place the eggs, coconut oil, peanut butter, vanilla extract and bananas into your Thermomix bowl and mix for 15 seconds,Speed 6 to combine.
Add the flour, baking powder, caster sugar, brown sugar and cinnamon to your Thermomix bowl and mix for 10 seconds, Speed 4.
Scrape down the sides of the bowl and mix for a further 5 seconds, 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.
Allow to cool in the tin for 10 minutes, before carefully transferring to a wire rack to continue cooling.