First of all in a bowl mix all dry ingredients all-purpose flour,salt, baking powder, cocoa powder, coffee and sugar

Make sure it's all sieved and there should be no lumps

Then in a separate bowl add 2 eggs, oil, vanilla essence and milk mix it all together

Then gradually add dry mixture into wet mixture and fold it

Make a smooth batter it should not be very thick not very thin

Then grease the baking dish for microwave should be heat proof grease it or place the butter paper

Then pour all the mixture into the dish and garnish with chopped walnuts on top

And put the dish into microwave oven for 4 minutes then check with the skewer if it's clean it's ready

Don't over cook otherwise it will be dry and hard it should be little gooey