Preheat oven to 180°C. Grease a cake tin & line the base with butter paper. Beat the butter & the sugar till light & creamy. Lightly beat the eggs. .
Add the eggs gradually, beating well. Add the vanilla essence & mix well. sieve the flour , self raising flour , bicarbonate of soda & cocoa powder together.
Mix the flour into the egg mixture using cut & fold method , adding the milk. pour the mixture into the prepared cake tin & bake in the per heated oven for 50 to 60 minutes.
Check by inserting a skewer , it should come out clean Leave in the cake in the tin for 30 minutes & then demould.