Preheat oven to 350°F (175°C) and grease an 8x8 inch baking pan.
Place the rinsed black beans, eggs, cocoa powder, maple syrup, coconut oil, vanilla, baking powder, and salt into a food processor or high-speed blender.
Pulse and blend until the mixture is completely smooth and no bean skins are visible.
Stir in the chocolate chips by hand using a spatula.
Pour the batter into the prepared baking pan and smooth the top.
Bake for 25 to 30 minutes, or until the edges are firm and a toothpick inserted into the center comes out mostly clean.
Allow the brownies to cool completely in the pan before slicing to ensure the texture sets properly.