Preheat oven for 10 min in 200 degree Celsius. And grease a 9×9 baking tin
Mix together oil, sugar and vanilla extract.
Grind 3tbsp of flax seed to powder and add 6tbsp of warm water. Mix and keep for 10mins.
Combain flour, coco powder, salt and baking powder
Slowly add flax seed powder mix and mix properly
Now pour the batter into the cake tin. spread chopped walnuts for extra crunch.
Bake for 30 to 35 mins in 180 degree Celsius or until the skewer comes out clean.