1. Mash the bananas with a fork in a large bowl. Add the sugars, oil, and vanilla extract and mix until well combined. In a second bowl mix flour with baking powder and salt – add gradually to the wet ingredients and mix until just combined. Depending on the size of the bananas you used, the dough might be a bit runny – it should be quite soft, but if you think it’s too much, add some more flour and mix in. Cover the bowl and place in the fridge for at least 1 hour or overnight.

2. Preheat the oven to 350˚F (180°C). Line two baking sheets with baking parchment. Mix the sugar with cinnamon in a small bowl. Make small balls with the dough (about 1 tablespoon dough per cookie) and roll in the sugar-cinnamon mix. Flatten the balls a bit and place on the baking sheets with at least 2 inches (5cm) space in between. Bake the cookies for about 8-10 minutes. Take out of the oven and let cool down on the baking sheet for some time and then transfer to a wire rack to cool completely.