Caster sugar 300gr
Unsalted butter, melted 140gr
Vanilla essences 1tsp
Plain flour 140gr
Cocoa powder 75gr
Preheat oven to 170`c.
Lightly toast walnuts in the oven. Remove from oven and leave it to cool.
Mix the eggs into a mixing bowl by hand held electric mixer to whisk until frothy then add the sugar and continue mixing. Add the butter and vanilla and whisk for a minute.
Sieve the flour and cocoa into the bowl and stir in with a wooden spoon. When thoroughly combined stir in the nuts. Transfer the mixture to the prepared tin and spread evenly.
Bake in the oven for about 25min until a skewer inserted halfway between the sides and the center comes out just clean. Leave it to cool completely before removing from the tin and cutting into several pieces.