Preheat oven to 350 degrees.
Use a fork to whisk together the ground chia seeds and water to create a chia egg. Set aside for a few minutes.
In a large mixing bowl, whisk together the oat flour, baking soda, and salt.
Add the coconut oil, coconut sugar, vanilla, and chia egg to the dry ingredients and stir until it's well combined.
Fold in the chocolate chips.
Divide the dough into 16 balls (or 12 balls for larger cookies), and place them on an ungreased cookie sheet
Smash the balls slightly, and place them in the oven for 11-13 minutes until they're starting to turn golden.
Let the cookies cool for a few minutes on the baking sheet before transferring to a cooling rack to finish cooling.