Preheat the oven at 180 C ten minutes prior to baking.
Sieve wholewheat flour, baking soda and powder, salt and cinnamon in a large bowl. Add rolled oats and set aside.
Add olive in a bowl, followed by jaggery powder. Whisk the mixture for 1-2 minutes using an electric beater till the jaggery dissolves. You can also use a manual whisker.
Now add egg and whisk again till the mixture becomes light and foamy. Another 2 minutes.
Now add vanilla extract and mix again.
Tip applesauce and whisk it completely gets incorporated in the batter.
Now add dry ingredients to wet ingredients in batches. Alternate between flour mix and milk. First add flour and then little milk. Gently mix the batter. Then add another batch of flour and milk and gently cut and fold the batter.
At last, add dark chocolate chunks as much as you like and gently mix again. This step is optional, although I highly recommend it.