Preheat the oven to 350°F. Spray an 8x8 or 9x9 inch baking pan or dish with non-stick spray or line with foil or parchment.
Put the black beans, spinach, and eggs in the bowl of a food processor and process until completely smooth. {You want there to be absolutely no chunks of beans!}
Add the oil, sugar, cocoa powder, vanilla extract, instant coffee powder, baking powder, and salt. Process until completely combined.
Transfer to the prepared baking dish. Sprinkle with chocolate chips, and put in the oven.
Bake in the preheated oven for 25 to 30 minutes, until a toothpick inserted in the center comes out clean.
Let cool for about 20-30 minutes before slicing. Enjoy!
Notes
Based on a recipe from Meal Makeover Mom's Kitchen blog