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