Preheat oven to 350 degree F.
Meanwhile, mash the bananas in a bowl and mix jaggery powder with the mashed bananas till they are completely blended.
Now add in the eggs, olive oil, yogurt and vanilla essence to the mashed banana mixture and whisk all the ingredients together to an even blend.
To the wet ingredients mixture made above, add Whole Wheat flour, Ragi flour, Cocoa powder, baking soda, salt and ground cinnamon. Mix everything together.
Once the dry and wet ingredients form a homogeneous mixture, add in the chocolate chips and give it a good mix.
Scoop out 2-3 tablespoons of mixture and pour into the lined muffin cups. I was able to make 12 muffins in total.
Sprinkle 3-4 chocolate chips on top of each muffin cup.
Once the oven is pre-heated, bake the muffins in the oven for around 25 minutes or till the muffins are done using the toothpick test, that is, when the inserted toothpick in the muffin comes out clean.
Remove the muffins from the oven, and allow them to cool for 5-10 minutes.
The Chocolate Banana Whole Wheat Ragi Muffins are ready to be served warm, or these can be stored in an airtight container in the refrigerator for a week!