Preheat oven at 180C. Grease and dust or line a 7" inch round tin or a loaf tin.

Take curd and sugar in a mixing bowl. Beat until creamy and light. Add oil to it and beat well.

Now sift flour and baking powder along with a pinch of salt to the wet ingredients. Fold and gently mix the batter.

remove 1/4 portion of the batter and add cocoa powder to it. Mix well. Add vanilla to the remaining batter and mix well.

Now pour the vanilla batter to the greased cake tin. Next add the chocolate batter.Gently make swirls or you can make proper marble pattern too.

Bake in the preheated oven for 35-45 minutes. Once the tester comes out with very few crumbs, let the cake cool in the tin for 10 minutes.

Invert the cake and let it cool for 15 more minutes. Slice and serve chocolate vanilla warm with coffee.