Preheat oven to 350℉
Prep cookie sheet with parchment paper or foil ungreased
Combine cassava flour, salt, baking soda in a small bowl
In a separate bowl combine softened butter and sugars. Beat with mixer until combined.
Add egg, yolk, vanilla and mix well until just combined.
Add cassava flour to wet mixture and slowly mix BY HAND ONLY. Fold cassava flour into wet ingredients. Dough will be sticky.
Fold in chocolate chips
Refrigerate for 30 minutes or until dough is more solid and easy to work with
Place rounded spoonful's (~1 tbsp dough) onto prepped cookie sheet spaced ~two inches apart.
Bake 7-8 minutes until bottoms are turning golden. Be careful not to overbake.
Allow to cool to room temp and enjoy!