Preheat your oven to 350°F (175°C). Line an 8x8-inch (20x20 cm) baking pan with a sheet of white parchment paper, leaving an overhang on the sides for easy lifting.

In your food processor, combine the well-rinsed black beans, melted coconut oil, vanilla extract, and espresso powder. Blend on high for 2 to 3 minutes until the mixture is completely smooth and velvety.

In a separate large mixing bowl, vigorously whisk the room temperature eggs and coconut sugar together. Continue whisking for about 2 minutes until the mixture becomes pale, frothy, and slightly thickened.

Gently fold the smooth black bean purée into the egg and sugar mixture until just combined. Add the chocolate protein powder, cocoa powder, baking powder, and salt, stirring gently with a spatula until no dry pockets remain.

Carefully fold the white chocolate chips into the thick batter. The batter will be quite dense and fudgy at this stage.

Pour the batter into your prepared pan, smoothing the top with a spatula. Scatter the dark chocolate chips evenly across the top, then bake for 22-25 minutes. Visual Cue: The edges should be slightly pulled away from the parchment, and the center should look just set with a glossy, crinkly surface.

Remove from the oven and let the brownies cool completely in the pan for at least 45 minutes. Lift them out using the parchment overhang and place on a marble surface or cutting board to slice into perfect squares.