Preheat your oven to 170 degrees and line a slice tin with baking paper.
Peel the bananas and place them into your Thermomix bowl along with the eggs. Mix for 10 seconds on speed 4.
Add the remaining ingredients and mix for 10 seconds, speed 4, REVERSE.
Scrape down the sides of the bowl and mix for a further 5 seconds, speed 4, REVERSE.
Pour the mixture into your prepared tin and bake in the oven for 35 minutes or until cooked through when tested with a skewer.