Preheat the oven to 350 degrees F. Grease a 9 by 9-inch square baking pan.
In a blender, puree the beans with the oil until it’s smooth.
In the bowl of a mixer, add the bean mix, eggs, cocoa, sugar, and vanilla. Mix on medium-high until smooth or about 15-30 seconds.
In a small bowl, whisk together the flour, baking powder, salt, and chocolate chips.Add it to the mixer and mix until incorporated or another 15-30 seconds.
Pour the batter into the prepared pan and bake until the surface is matte around the edges and still shiny in the middle, about 30 minutes. Let cool at least 15 minutes before cutting and removing from the pan. Dust with powdered sugar and serve.