Sift the whole wheat flour with baking powder, baking soda and cinnamon powder and keep aside, powder the rolled oats in a mixture grinder and keep it aside.

Then add the mashed bananas and mix nicely with a hand beater for 2-3minutes

Pour the batter in a baking tin lined with parchment paper, sprinkle some walnuts and oats over the batter and bake it in a preheated oven for 45 minutes on lower rack, both coil on.

Check by inserting a toothpick, if it comes out clean after 45minutes then remove the cake from the oven and cool it on a wire rack for 2 hours before slicing it, incase if the toothpick does not come out clean keep for 8-10minutes more by turning on only the lower rack of the oven.