1
Prepare the Dates. Place the pitted dates in a bowl, cover with just-boiled water, and let them soak for 10-15 minutes until soft and plump, then drain well and blend into a smooth paste.
2
Prepare the tin and oven. Preheat the oven to 175 °C (165 °C fan). Line a 20×30 cm brownie tin with baking parchment.
3
Wet Mix. Mash bananas until smooth, then whisk together with the date paste, eggs, oil, and vanilla until combined.
4
Dry Mix. In another bowl, mix flour, cocoa, baking powder, baking soda, and salt.
5
Combine. Fold the dry mix into the wet mixture until just combined (do not overmix)
6
Bake. Pour the batter into the prepared tin, spread evenly, and bake for 30-35 minutes, until a skewer inserted in the centre comes out with a few moist crumbs (not wet batter).
7
Cool and portion. Allow the brownie to cool completely in the tin, then lift it out and cut into 16 squares.