Method:-
Preheat the oven to 180 degrees Celsius and prepare making the batter.
Sift the flour, castor sugar, cocoa powder and baking powder in a bowl.
In another bowl add butter and vanilla essence with the eggs.
Add the dry ingredients to the wet ingredients and mix well until a smooth texture is formed.
Add chopped walnuts inside and grease the pan with baking paper and butter.
Put the pan inside the oven and make sure that the brownies should not get burnt.
Use a toothpick to be sure if it's done.
Remove it from the oven and let it cool for 15 minutes.
Cut the cakes into small squares and serve it with a scoop of vanilla ice cream.