Preheat oven to 180 degree C for 10 mins. Grease a baking pan. Cream the jaggery and yogurt until dissolved. Add baking powder and baking soda and combine. Leave aside for 3 mts. You will find that bubbles appear. Add vegetable oil, salt and vanilla essence and mix well. Now, slowly add little sifted flour and cocoa powder and fold into the wet ingredients. Add coffee mixture(coffee powder added in little water).All ingredients should be at room temperature.

Bake in preheated oven at 180 degree C for 40 to 45 mins till a toothpick inserted into the cake comes out clean. Cool the cake for 20-30 mins and then overturn onto a plate. Icing : I bought whipped cream from store and using electric blender did the frosting.