01 - Preheat oven to 350°F. Grease and flour a 9-inch round or square cake pan.
02 - In a large mixing bowl, whisk together mashed bananas, oil, eggs, sugar, and vanilla until smooth and well combined.
03 - In a separate bowl, sift together flour, baking powder, baking soda, and salt.
04 - Gradually add dry ingredients to the wet mixture, stirring gently until just combined. Take care not to overmix.
05 - Fold in chocolate chips, reserving a small handful to sprinkle on top of the batter.
06 - Pour the batter into the prepared pan and scatter reserved chocolate chips over the surface.
07 - Bake for 40 to 45 minutes, or until a toothpick inserted in the center emerges clean or with just a few moist crumbs attached.
08 - Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.