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 or melted butter, eggs, sugar, and vanilla extract until homogenous.
03 - In a separate bowl, sift together all-purpose flour, baking powder, baking soda, and salt.
04 - Gradually add the dry ingredients to the banana mixture, blending gently until just combined. Avoid overmixing.
05 - Fold in most of the chocolate chips, reserving a small handful for topping.
06 - Pour the batter into the prepared pan and evenly distribute the 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 a few moist crumbs.
08 - Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.