Ingredients:
3 medium very ripe bananas, at room temperature
1/4 cup buttermilk, at room temperature
2 teaspoon vanilla extract
2 cups sifted cake flour
1 teaspoon baking soda
3/4 teaspoon baking powder
1/4 cup unsifted unsweetened good cocoa powder
3 tablespoon boiling water, plus more if needed
180gm unsalted butter, softened
1 cup sugar
2 large eggs, at room temperature, lightly beaten
Instructions:
- Preheat oven to 175C. Lightly spray the 9 x 5 inch loaf pan with vegetable oil and line with a parchment paper that extends 1 inch beyond the long edge of both side s of the pan.
- Peel the bananas and mash them with a fork or using a food processor. Mash or process to a smooth puree. Measure 1 cup of the puree and transfer it to a medium bowl. Add the buttermilk and vanilla and whisk until blended. Set aside.
- Sift the cake flour, baking soda and baking powder into a medium bowl. Whisk to blend well and set aside.
- Place the cocoa powder in the small bowl. Pour the boiling water over the cocoa powder and stir until smooth. If it is too thick, add a little water. Set aside.
- Combine the butter and sugar in the bowl of a stand mixer. Beat on medium high until the butter is very light and white in colour, about 4-5 minutes. Scrape down the bowl with a silicone spatula.
- On medium speed, gradually add the beaten eggs, 1 tablespoon at a time. About halfway through, turn the mixer off and scrape down the bowl. Continue adding the rest of the eggs. Scrape the bowl again.
- On low speed, add one third of the flour mixture. Add half of the banana mixture. Repeat with the flour-banana-flour. Scrape down the bowl and finish blending the batter by hand using a silicone spatula.
- Transfer half of the batter to a clean medium bowl. Add the cocoa paste and blend well.
- Drop alternating spoonfuls of dark and light batters into the prepared pan, then marbleize by using a spoon or knife.
- Bake the cake for 55-60 minutes or until a cake tester inserted into the center of the cake comes out clean.
- Transfer the cake to a wire rack and let it cool completely in the pan. When cool, remove from the pan, peel off the parchment paper and cut slices with a serrated knife.
Note:
To ensure that the cake has an intense burst of banana flavor, be sure to use bananas that are very ripe and soft, with plenty of black spots speckling their skins.



















































