In a blender, add 10 pieces of dried plums (prunes) and 1/4 cup of water. Blend till you form a paste. It might not be extremely smooth, but the tiny pieces of dried plums enhance the cookie texture, so it's a win-win situation in any case. Set aside the puree for later use.
Mix the butter and jaggery powder till it is completely blended with the butter. I prefer to mix by hand since I don't use mixer. Whisk or spatula is not helpful in this case, since the butter is not in a completely melted state.
Add in the egg and vanilla extract to the above and mix everything together.
Add prunes puree to the mixture and stir till all the ingredients are uniformly mixed. The wet ingredients mixture is now ready.
For the dry ingredients, mix in whole wheat flour, baking soda, baking powder and salt to the wet mixture.
Finally add the chocolate chips, and give it a good mix with hand. It is advisable to put the dough in the fridge for at least 10-20 minutes.
Remove the cookie dough from the refrigerator. Line a baking tray with parchment paper.
Preheat oven to 375 degree F.
Take around 1 - 1 1/2 tablespoon of dough in your hands, form a ball, and flatten a little. I was able to make 19 cookies with the prepared dough.
Bake the cookies for around 10-12 minutes in the preheated oven, or till you see creases on top of the cookies. The cookies will be soft to touch, but once cooled, they will be fine.
Remove the cookies from the oven, and allow them to cool for at least 5-10 minutes.
The Dried Plums (Prunes) Chocolate Chip Cookies are now ready to be served. Also, these can be stored in an air-tight container.