01 - Preheat your oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
03 - Beat in the eggs one at a time, then mix in the vanilla extract until fully incorporated.
04 - In a separate bowl, whisk together the flour, baking soda, cinnamon, and salt until well blended.
05 - Gradually add the dry ingredients to the wet mixture, mixing until just combined. Avoid overmixing to prevent tough cookies.
06 - Stir in the rolled oats and chocolate chips with a spatula until evenly distributed throughout the dough.
07 - Scoop heaping tablespoons of dough onto the prepared baking sheets, spacing about 2 inches apart to allow for spreading.
08 - Bake for 10-12 minutes, or until the edges are golden brown and the centers are still slightly soft.
09 - Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.