Preheat oven to 180 Degrees Celsius. Grease a round cake pan, flour it lightly and keep it ready.
Sift flour, baking soda, baking powder, cocoa powder, coffee powder together and keep it ready.
In another bowl whisk together yogurt and powdered sugar. Now add vegetable oil, milk, vanilla essence and mix it well.
Add the flour mixture to the wet ingredients and fold gently till a batter of dropping consistency is formed.
Pour the batter into the 8 inch cake pan and bake at same temperature for 40 minutes or till a tooth-pick inserted comes out clean.
Take the pan out of the oven and once cooled down completely invert on to a plate and let it cool down completely.
Now lets prepare the Chocolate Ganache. You can start the preparations when your cake is in the oven.