200g milk chocolate,broken into pieces
225g light soft brown sugar
1tsp vanilla extract
100g plain flour
30g cocoa powder
Preheat the oven to gas 4,180c,fan 160c.Grease 20cm square baking tin and line with nonestick
Put the butter and 150g chocolate in a heatproof bowl set over a pan of barely simmering water,stirring often,until completely melted.Remove and set aside to cool a little.
Put the eggs,sugar and vanilla in a separate bowl and whisk to combine.Stir in cooled chocolate,then sift in flour and cocoa.Add the remaining chocolate ;mix well.
Pour the mixture into the lined tray and bake for 20-25 mins,until a thin crust forms on the surface with a silght wobble.
Remove from the oven and leave to cool in the tin for 30 mins,before transferring to a wire rack to cool completely.Cut into 36 squares and chill until ready to serve.