Take a wide bowl and start mashing the bananas with the help of the fork. (You will get around 1 cup of mashed banana).
Add the brown sugar, milk, vanilla extract and oil to the mashed banana and mix it with the help of the fork.
Now add the dry ingredients one by one, ragi (finger millet) flour, whole wheat flour, salt, baking powder, baking soda and mix it with the fork.
Meanwhile preheat the oven for 350 F and grease the loaf pan with oil and dust some flour on it.
Fold in the chocolate chips into the cake batter gently.
Pour the batter into the greased loaf pan and tap it for even spreading.
Bake the bread for 55-60 minutes.
After 50 minutes, insert a toothpick into the bread and check whether it comes out clean.
Once done, take the bread out from the oven and give a resting time for 10 minutes and then remove the bread from the loaf pan and place it in cooling rack. Let the bread rest for another 30 minutes before slicing.
Slice the bread and enjoy.