In blender,add egg yolk,coconut oil,banana and blend well.
Take out in a bowl,add grinded mixture,whole wheat flour,cerelac,cinnamon powder,cardamom powder,mix well and knead until dough is formed.
Grease hands with oil,take a mixture and make biscuits of equal sizes (makes 8).
On baking tray lined with butter paper,place biscuits and bake in preheated oven at 170 C for 30 minutes.