Preheat oven to 175°C. Line 20cm square pan.
Blend black beans, date paste, applesauce, and vanilla until completely smooth.
Mix cocoa powder, flour, baking powder, and salt in a bowl.
Fold wet into dry until just combined. Fold in chocolate chips.
Pour into pan. Bake 25-30 minutes until edges are set but centre is still slightly fudgy.
Cool completely before cutting - they firm up as they cool.