First, peel the bananas, cut them into pieces and mash them with the tines of a fork.
Add soy milk, sugar and oil and start blending with a blender.
Sift flour, cocoa, salt and cinnamon into a bowl and add them all together, then mixing with a spatula.
Coarsely chop the walnuts and incorporate them into the mixture, leaving some aside for decoration.
Pour the mixture into the mold lined with baking paper, decorate with the remaining walnuts and cook for 30-40 minutes at 180°C, in a pre-heated static oven.
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