Add vanilla essence to the Biscuits powder, and milk in small batches.Mix it well to make a lump free smooth batter.Now add regular eno fruit salt 1 tsp,add 1 tbsp milk on it and mix well.pour this batter inthe greased cake tin and tap it 2-3 times.Sprinkle chopped nuts and choco chips on it.Keep the tin in preheated kadhai,cover and bake it on Medium flame for 35-40 min.