125g butter
120g chocolate chips
2 eggs
1 cup Chelsea Caster Sugar
100g flour
125g walnuts/or other nut
Chelsea Icing sugar to dust

Preheat oven 180 degree C.
Place baking paper in square tin.
Melt butter and chocolate in saucepan over a low heat stirring to prevent chocolate sticking. When smooth remove from heat and leave to cool.
Beat eggs and Chelsea Caster Sugar until think and creamy.
Stir in chocolate mixture (slowly), flour and nuts.
Pour into tin and bake for 30 minutes.
Cool and cut into squares.  
Dust with Chelsea Icing Sugar.