In a mixing bowl, whisk flour, sugar, cocoa, baking powder, baking soda and salt.
In a separate bowl, whisk bananas, eggs, oil, milk, water and vanilla.
Add wet to dry and stir until just combined.
Pour batter into a greased and floured cake pan.
Bake for 35-40 minutes or until a wooden pick comes out clean.
Allow to cool before removing from pan. Finish cooled cake with chocolate glaze topping, if desired Topping- 1.5 cups pure icing sugar 1/2 medium over ripe (approx. 1/4 cup) banana, mashed 1 tablespoon soft butter 1/2 teaspoon vanilla essenceCombine all ingredients in a bowl and stir until icing is spreadable.
Add more sugar if necessary to thicken. Spread icing over cold cake immediately.