In a bowl beat butter and sugar first until fluffy.

Add in the eggs one by one as you continue to mix with your mixer.

When completely mixed add in some vanilla essence and begin to add in seived flour bit by bit as you mix.

Now devide the mixture in two equal halfs. Add cocoa powder in one of the mixture and mix completely.

Now pour in a well greased baking tin as you alternate the two mixtures.

Bake at 180° for 50 minutes or until a skewer comes out clean.

Cool and enjoy the cake with a hot or cold drink.