01 - Preheat oven to 350°F. Grease and line a 9-inch cake pan with parchment paper.
02 - In a large bowl, whisk together mashed bananas, eggs, vegetable oil, granulated sugar, light brown sugar, and vanilla extract until smooth.
03 - In a separate bowl, whisk together all-purpose flour, baking soda, baking powder, ground cinnamon, and salt.
04 - Gradually add dry mixture to the wet ingredients, stirring gently until just combined. Avoid overmixing to maintain tenderness.
05 - Gently fold in chopped nuts or chocolate chips if desired.
06 - Transfer batter into the prepared cake pan and smooth the surface with a spatula.
07 - Bake for 35 to 40 minutes, or until a toothpick inserted into the center emerges clean.
08 - Allow cake to cool in the pan for 10 minutes, then transfer to a wire rack. Serve warm or at room temperature.