How to make Chocolate Pound Cake -
Grease the sides and bottom of a loaf pan with cooking spray.
Sprinkle one teaspoon flour and leave aside.
Blend prunes puree with margarine in a bowl. Add sugar and beat properly.
Add egg whites in the above and beat again for 5 minutes until blended. Now add vanilla.
Mix together the remaining flour, soda, cocoa and salt in a separate bowl.
Add it to the prune puree blend alternatively with yoghurt.
Pour this mixture into the greased loaf pan.
Bake for 55-60 minutes in a preheated oven at 350 degrees F.
Allow to cool and chocolate pound cake is ready.