Preheat oven to 350°F. Line a cookie sheet with a silicone baking mat or parchment paper.
In a large bowl or stand mixer, cream together butter with granulated sugar and light brown sugar. Beat until light and fluffy. Mix in egg and vanilla, followed by baking powder, baking soda, salt and cinnamon. Scrape the bowl as needed. Mix in flour, followed by old fashioned oats. Mix until just combined and no streaks remain. Stir in chocolate chips.
Scoop dough using a medium cookie scoop, spacing 2-3 inches apart on prepared baking sheet. If desired, top off with additional chocolate chips. Bake for 10-11 minutes. Allow cookies to rest on the pan for 3-5 minutes, then transfer to a wire rack to cool completely.
Nutritional information is provided as a courtesy and is an estimate only. Nutrition information can vary for a variety of reasons. For the most accurate data, use your preferred nutrition calculator with the actual ingredients you used to make this recipe.
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