The chewiest of all chewy chocolate chip cookies have oatmeal and aren't over baked.

Chewy Chocolate Chip Cookies

Preheat oven to 375 degrees. Stir together oats, flour, baking soda, and salt; set aside. 

Beat butter in a large mixing bowl with an electric mixer on medium for 30 seconds. Add brown sugar and granulated sugar. Beat on medium for 2 minutes, scraping sides of bowl occasionally. Beat in eggs and vanilla until combined. Beat in as much oats mixture as you can with the mixer. Stir in any remaining oats mixture; add chocolate chips. 

Drop cookie scoops, about 1-1/2 tablespoons, of dough 2-inches apart on ungreased cookie sheet. Bake for 9 to 10 minutes or until edges are light brown. Let cookies stand on cookie sheet 1 minute. Remove from sheet and cool on a wire rack. 