Mix together the butter, brown sugar and egg until well blended.
Add flour a little at a time and mix well.
Add the flax, salt, vanilla and cinnamon and mix until completely combined.
Place in the refrigerator for at least an hour or even overnight.
Preheat oven to 375 degrees F.
With a tablespoon, scoop cookie dough and roll into a ball with your hands.
Flatten with your fingers and sprinkle with unrefined sugar.
Place a pecan in the center of the cookie.
Bake for 10-15 minutes until the edges are golden brown.