2. Mash the Bananas
Peel the ripe bananas and mash them with a fork or potato masher until smooth. The riper the bananas, the sweeter and more flavorful they will be, so make sure they’re well overripe to achieve the best texture and taste for your cake.
3. Mix Dry Ingredients
In a medium bowl, whisk together the flour and cocoa powder. This ensures that the cocoa is evenly distributed throughout the flour and avoids clumps in the cake batter. Set aside.
4. Cream Butter and Sugar
In a separate large mixing bowl, beat the softened butter and sugar together until light and fluffy. This will take about 2-3 minutes of mixing. The butter should be at room temperature, which helps it blend seamlessly with the sugar.
5. Add Mashed Banana and Sour Cream
Add the mashed bananas to the butter-sugar mixture and beat until combined. Then, stir in the sour cream, which will add moisture and richness to the cake. The sour cream also helps the cake stay soft and tender, creating that melt-in-your-mouth texture.
6. Incorporate Dry Ingredients
Gradually add the dry flour and cocoa mixture to the wet ingredients. Mix until just combined, being careful not to overwork the batter. Overmixing can lead to a denser texture. The batter should be thick, smooth, and creamy.
7. Bake the Cake
Pour the batter into the prepared cake pan and smooth the top with a spatula. Bake the cake in the preheated oven for about 30-35 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
8. Cool the Cake
Once the cake is done, remove it from the oven and allow it to cool in the pan for 10-15 minutes. Then, transfer it to a wire rack to cool completely. This helps prevent the cake from becoming soggy.
9. Serve and Enjoy
Once the cake has cooled, slice it into generous pieces and enjoy! For an added touch of decadence, you can top it with whipped cream, chocolate ganache, or even a few slices of fresh banana for extra flavor and decoration.