Gather the ingredients. Preheat the oven to 325 degrees F (165 degrees C).

Combine flour, baking soda, and salt in a medium bowl. Set aside.

Beat butter, brown sugar, and white sugar together in a large bowl until smooth. Beat in eggs one at a time, until well combined; stir in vanilla extract.

Stir flour mixture into egg mixture until just blended. Mix in quick oats, walnuts, and chocolate chips.

Drop batter by heaping spoonfuls onto ungreased baking sheets.

Bake in the preheated oven for 12 minutes. Allow cookies to cool on baking sheet for a few minutes before transferring to a wire rack to cool completely.