Preheat the oven to 350 degrees. Cover two baking sheets with foil and spray with cooking spray.
With a stand or hand mixer, cream butter and sugars on medium high speed for 3 minutes. Add the egg and vanilla and beat for 1 minute more, until light and fluffy.Sugar and butter creamed after 3 minutes of beating on medium-high speed.After adding egg and vanilla, the batter is light and creamy.
Add the flour, baking soda, baking powder and pinch of salt, each slowly and on low speed. Add the oats and combine, and then the chocolate chips and combine - all on low speed.
Using a half-tablespoon, drop 12 cookies, evenly spaced, onto one cookie sheet. Bake cookies for 10 minutes, turning halfway through. While they cook, drop 12 more cookies on second sheet.
When first round of cookies are done, pull them out and let them cool 2-3 minutes before moving to a cooling rack. Pop the second sheet in and repeat with remaining 12 cookies and cooling.