In a small bowl combine the ground flax with 3 tablespoons of water
In a large bowl combine the butter and sugar with a hand mixer.
Add the flour, cornstarch, baking soda, cinnamon, salt, flax mixture, and 2 tablespoons of water. Mix with the hand mixer until combined. If the batter is too dry add 1 more tablespoon of water or non-dairy milk.
Stir in the chocolate chips.
Using about 1 ½ tablespoons of the cookie batter, form dough into 24 balls and place on 2 cookie sheets lined with parchment paper.
Bake the cookies for 10 minutes then let them cool for 10 minutes on the sheet pan.
Transfer to a cooling rack and cool for 5 minutes. The cookies are ready to serve.