Take bowl pour curd, sugar,oil and whisk it when sugar is dissolve properly now add vanilla extract and mix it

Now take another bowl and put maida baking powder mix it. Now all wet ingredient add in dry ingredients and milk, mix it,

Batter is ready.Now divide it two parts,take one bowl add cocoa powder. Now grease the mould spoon by spoon pour the batter and make marble design

Pre- heat the kadhai for 7 mins,place the mould and bake it for 30 mins,cake is ready.