Preheat your oven to 350 degrees.
Cream together your butter, brown sugar and white sugar in a large bowl until smooth.
Add in your eggs and vanilla extract and stir until just combined.
Dump in the flour, oats, baking soda, salt, and cinnamon. Stir everything together till combined.
Add in your chocolate chips and fold them into the batter.
Scoop your cookie dough into large 2 TBS sized cookie balls and roll into balls.
Place cookie balls onto a baking sheet lined with parchment paper or a silicone liner.
Bake cookies for 8 to 11 minutes till they start to look golden and set.
Remove the pan from the oven and allow cookies to set on pan for about 5 minutes.
Remove cookies to a cooling rack to cool completely.