01 -
Heat oven to 350°F (176°C). Blend black beans in a food processor until smooth. In a bigger bowl, combine the blended beans with oil, eggs, and vanilla.
02 -
In another bowl, whisk together cocoa powder, sugar, baking powder, salt, and coffee (if you're using it). Add this mixture to the wet one and give it a good mix. Fold in chocolate chips last.
03 -
Prepare a square pan (8x8 or 9x9 inch) by greasing it and lining it with parchment. Pour the batter in evenly. Bake 30-40 minutes until the edges are firm and the middle looks almost set.
04 -
Let the brownies cool all the way through before cutting them into pieces.