Mix the dry ingredients with a whisk; sugar: salt, all-purpose flour, cocoa powder, and baking soda. Set it aside.
14.1 oz Granulated sugar, 1 teaspoon Salt, 10.6 oz All purpose flour, 3.5 oz Cocoa powder, 1 tablespoon Baking powder, 1 tablespoon Baking soda
Mash ripe bananas with a fork or potato masher in a separate bowl until the chinks look like an oatmeal breakfast meal.
14.1 oz Banana (Ripe)
Add all the wet ingredients; whole eggs, oil, and vanilla extract to the mashed bananas. Mix them with a whisk until evenly mixed.
7 oz Egg, 7 oz Oil, 2 teaspoon Vanilla extract
Add the dried ingredients to the wet ingredients. The batter is quite thick at the very beginning. Fold it with a spatula until it is evenly incorporated.
Add hot simmering water: Add ⅓ - ½ of the whole amount first, mix well, and add the rest to prevent the cake batter from getting cooked. Mix until evenly incorporated.
14.1 oz Hot water
Pour the cake batter into the prepared pans and bake (Preheated) at 365ºF (185ºC) for about 40 minutes until the center cooks through. (Adjust the time & temperature, depending on the oven, the size of the pan, the thickness of the cake, etc.) Insert a toothpick and see if it comes off clean. You might see the toothpick is a little bit wet because of the mashed banana, which is fine. Just ensure it's not the wet batter. Or touch the center of the cake to check: It should be dry and bounce back gently. Let the cakes cool down on a kitchen counter until they feel slightly warm in touch before taking them out from the pans. Insert a spatula or a small knife around the cake to ensure it is not sticking to the pan. Push the spatula inward slightly to detach the side and the bottom.