Combine oil, egg, sugars and vanilla.
Add baking soda, salt, starch and flour.
Mix until combined and add chips.
Mix. Cover and chill in the fridge for at least 2 hours.
Preheat the oven to 350 and line a baking sheet with parchment paper.
Use a cookie scoop to form cookies.
Bake for 10-12 mins.
Allow cookies to cool completely before eating.