Mix the butter and unrefined cane sugar till the sugar is completely blended with the butter. I prefer to mix by hand since I don't use mixer. Whisk or spatula is not helpful in this case, since the butter is not in a completely melted state.
Add in the egg to this mixture. Now add vanilla essence to the above mixture and stir till all the ingredients are uniformly mixed. The wet ingredients mixture is now ready.
For the dry ingredients, mix in oats flour, whole wheat flour, baking soda, baking powder and salt to the wet mixture.
Finally add the chocolate chips and chopped walnuts, and give it a good mix with hand. It is advisable to chill the dough in the refrigerator for at least an hour.
Remove the cookie dough from the refrigerator and let it come to the room temperature (for at least 15 minutes).
Preheat oven to 375 degree F.
Line a baking tray with parchment paper.
Take around 1-2 tbsp of dough in your hands, form a ball, and flatten a little. I was able to make 15 cookies with the prepared dough.
Bake the cookies for around 15-17 minutes in the preheated oven, or till you see creases on top of the cookies. The cookies will be soft to touch, but once cooled, they will be fine. It took me exactly 17 minutes to bake them to the right texture.
Remove the cookies from the oven, and allow them to cool for at least 5-10 minutes.
The Healthy Oatmeal Chocolate Chip Cookies are now ready to be served warm or these can be stored in an air-tight container for 5-7 days!