Preheat oven to 350°F.

Whisk together the flour, cinnamon, baking soda, and salt. Set aside.

Mix together the butter, brown sugar, and granulated sugar. Mix in the egg and vanilla extract.

Slowly add the dry ingredients to the wet ingredients. And fold in oats and chocolate chips.

Refrigerate for 30 minutes.

Bake for 10-13 minutes.