Step 1

Preheat your oven to 325°F. Line an 8-inch square baking pan with parchment paper. Grease the paper with cooking oil spray, and set the pan aside.

Step 2

In a blender or food processor, place the drained and rinsed beans, eggs, oil, vanilla and coffee, and blend or process until smooth.

Step 3

In a large bowl, place the cocoa powder, baking soda, salt and brown sugar, and whisk to combine well, breaking up any lumps in the brown sugar.

Step 4

Create a well in the center of the cocoa powder mixture and add the pureed bean mixture. Mix until well-combined.

Step 5

Add about half of the (optional) chocolate chips to the batter and mix to combine. The mixture will be thickly pourable.

Step 6

Pour the mixture into the prepared baking pan and spread into an even layer. Sprinkle the remaining (optional) chocolate chips even on top of the batter, and press down gently to help the chips adhere.

Step 7

Place the baking pan in the center of the preheated oven. Bake until the top springs back when pressed gently with a finger (about 25 minutes).

Step 8

Continue to bake your brownies until the top is set, and it springs back when pressed gently in the center with your forefinger. And when you shake the pan gently from side to side, it doesn't jiggle at all.

Step 9

For cakier brownies, lower the oven temperature to 300°F and continue to bake for another 3 to 5 minutes or until the center is really stable.

Step 10

Remove the pan from the oven, place it on a wire rack (still in the pan) and allow to cool until no longer hot to the touch.

Step 11

Remove from the pan and slice into squares with a sharp knife. For cleaner slicing, place the bars still in the cooled pan in the freezer for 10 minutes before removing from the pan and slicing.