Sieve and mix all the dry ingredients together except cocoa powder

Now in a mixing bowl take all the wet ingredients, whisk nicely with an electric whisker or manually,

Add whisked wet ingredients to dry ingredients, fold gently, now take half portion of this batter in to a separate bowl,

Add 3 tbsp cocoa powder into it fold again, make sure that the batter should be thick,

Grease the cake tin, pour in the plain cake batter one ladle, on top of that pour in, the cocoa powder mixed batter one ladle, repeat the process.

Bake the cake in preheated oven on 180 degree celcius for about 40 minutes and check whether it's done by tooth pick,when it's done,

Cool the cake completely, decorate the cake according to your taste, I decorated with chocolate ganache and some caramelized nuts.Now your marble cake is ready to serve.