preheat your oven at 180 degree c
take a bowl add butter, sugar and essence
beat the mixture well for 2-3 minutes
add milk and mix well
sieve all the dry ingrediants. flour, milk powder, baking powder and soda
now add the dry mixture into wet mixture in a small batch, mix with cut and fold method
add more milk if batter is too thick
divide the batter into 2 equal portions
add cocoa powder in one portion, and if required add some milk and mix well
grease a round baking tin with oil
in the middle of the pan pour 2 tbsp of each batter one by one at a time to create layers
repeat the process till the end
use wooden stick to get the desired design
place the pan inside the preheated oven and bake for 25-30 minutes
to check if it is cooked, insert a tooth pick and it should come out clean
let it cool and enjoy