Preheat the oven to 400 degrees Line a large sheet pan with parchment paper or a silpat liner.
In a stand mixer fitted with the paddle attachment, beat together the brown sugar, white sugar, and room temperature (NOT melted) butter until creamy. The mixture should look like peanut butter.
Add in the eggs and vanilla extract and beat until combined.
In a separate bowl, combine the oats, baking powder, baking soda, sea salt, flour, and chocolate chips. Whisk until combined.
Add the dry to the wet and mix until just combined being careful to not overmix.
Roll out golf-ball sized dough balls and place 2 inches apart on the prepared baking sheet. Bake 6-8 minutes or until just lightly golden brown. Watch carefully to avoid over-baking; slightly under-baked oatmeal cookies make the best chewy cookies!
Alyssa Also Recommends:Want to make this even easier? Here are a few products that I LOVE:•The Recipe Critic Measuring Cups •Kitchen Aid Stand Mixer •Nordic Wave Baking Sheet