Line baking sheets with parchment paper, set aside. In a medium mixing bowl, combine the flour, baking powder, baking soda, cinnamon and salt, set aside.
In a large mixing bowl combine oil, sugars, eggs, and vanilla. Whisk well to combine.
Add in the dry ingredients. Mix until fully combined, fold in the oats.
Cover and allow the dough to chill for 30 minutes. Preheat oven to 350 degrees F.
Using a portion scoop or measuring spoon, scoop even sized balls of cookie dough – roughly 1 oz. Arrange evenly on the prepared baking sheets, leaving 2-3 inches between each cookie.
Bake at 350 for 9-11 minutes until golden brown, cookies will still be soft in the middle. Allow to cool for a few minutes on the cookie sheet before transferring to a wire rack to cool completely.