I have made some changes to the recipe & here it follows.....
Ingredients : 1 cup whole wheat flour,1/2 tsp baking powder,1 tsp baking soda,4-5 heaped tsp s Bournvita powder( in place of cocoa powder ),1/2 cup sugar,2tbsp oil,1/4 cup coffee ( mixed 1 tsp Bru coffee powder in 1/4 cup warm water ),1/2 cup buttermilk,1 tsp vanilla essence.
Method :Line the microwaveable vessel with butter paper.I arranged some Cadbury gems in a circle on the butter paper.
Mix all the dry ingredients : whole wheat flour,baking soda ,baking powder,sugar,Bournvita powder nicely. in a bowl.Keep aside.
Then mix all the wet ingredients : buttermilk,oil,vanilla essence& coffee in another bowl.Now make a well in the dry mix bowl.Slowly pour the wet mix into the well.Mix so that no lumps remain.Pour this mix into the microwaveable vessel .Microwave for 7-8 minutes.Let it stand for 10 minutes in the microwave.Then take out the cake.If a tooth pik inserted in the cake ,comes out clean,cake is done.Otherwise bake it for 1-2 minutes.
Remove the vessel out of the microwave to cool it. after 20-30 minutes,turn the vessel upside down on to plate.Cut the cake into desirable shapes & serve.
Buttermilk quantity may have to be adjusted -less or more than 1/2 cup can be used.For baking in microwave,consistency has to be slightly more watery than drop down consistency.
My kid took the cake to school & all her friends relished it !