
Preheat a convection oven or convection microwave to 180°C / 356°F. Grease and line a cake pan, then set it aside.



Peel the ripe bananas and blend them into a smooth puree using a mixer or blender.



Transfer the banana puree to a large mixing bowl. Add the brown sugar, oil, vinegar, and vanilla extract, then whisk until smooth and well combined.



Whisk in the milk. In a separate bowl, sift together the all-purpose flour, cocoa powder, baking powder, baking soda, and salt, then add the dry mixture to the wet ingredients.


Mix gently until no dry streaks remain. Add the water a little at a time to make a smooth, pourable cake batter; avoid overmixing.


Fold in the tutti frutti until evenly distributed through the batter.



Pour the batter into the prepared cake pan and smooth the top. Sprinkle chocolate vermicelli over the surface.


Bake for about 30 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs. Let the cake cool in the pan for 10 minutes, then unmold it onto a rack.
Sprinkle extra tutti frutti on top if desired. Slice and serve once the cake has cooled slightly.




