Preheat the oven to 180°C.

In a food processor or blender add the beans, chickpeas, eggs, dates, maple syrup and vanilla and mix together. Add the coconut oil and cocoa powder and mix again until you have a silky mixture. Pour the mixture into a 20cm x 30cm baking tin lined with baking paper. Bake in the oven for 30-35 minutes. Let the mixture cool completely before cutting in squares (otherwise it might break).