Tip the batter into the prepared tin, gently level the surface with a spatula or palette knife, and bake for 20-30 mins, or until just set – the top should have a shiny crust, but the centre should have a slight wobble. Leave to cool completely in the tin, about 1 hr. Remove to a board and cut into 16 pieces. Will keep in an airtight container for up to five days.
Healthy chocolate brownies
Heat the oven to 190C/170C fan/gas 5 and line a shallow 23cm square baking tin with baking parchment. Tip the beans, cocoa, coffee granules, xylitol, vanilla, eggs and yogurt into a large bowl. Blitz using a hand blender until smooth. Or, do this in a food processor. Add the baking powder, then blitz again.