Preheat the oven to 180 C or 350 F or Gas Mark 5
Melt the butter in a microwave and stir int he sugar and vanilla essence.
Mix in the eggs, one at a time
Once all the eggs have been added, sieve the rest of ingredients and fold in.
Pour into a greased baking tin or cake tin
Cook for 25-30 minutes in the oven. Brownies can left a little gooey if you prefer them that way.
Sieve a little icing sugar on top once the cake is cooled.