Start by preheating your oven to 350°F. Get your baking sheets ready by lining them with parchment paper or silicone liners, or give them a light spray with cooking spray.
Using a stand mixer with a paddle attachment or a handheld mixer in a large bowl, cream the butter and sugars together until they're light and fluffy, which should take about 1 to 2 minutes.
Then, mix in the eggs and vanilla until creamy and well-blended, another 1 to 2 minutes. Sprinkle in the baking soda, baking powder, and salt, and mix well.
Finally, add the flour, oats, and chocolate chips, stirring just until everything is evenly incorporated.
Scoop the cookie dough into balls, each about 2 tablespoons in size, and place them a couple of inches apart on your prepared baking sheets.
Bake the cookies in the preheated oven for 9 to 11 minutes or until they are just set and lightly golden. Remember, they'll continue to cook a bit after you take them out, so don't overbake!