01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, cream together softened butter, brown sugar, and granulated sugar until light and fluffy.
03 - Beat in eggs one at a time, then mix in vanilla extract until fully incorporated.
04 - In a separate bowl, whisk together flour, baking soda, cinnamon, and salt.
05 - Gradually add dry ingredients to wet mixture, mixing until just combined. Do not overmix.
06 - Stir in rolled oats and chocolate chips with a spatula until evenly distributed throughout dough.
07 - Scoop heaping tablespoons of dough onto prepared baking sheets, spacing about 2 inches apart.
08 - Bake for 10 to 12 minutes, or until edges are golden brown and centers remain slightly soft.
09 - Let cookies cool on baking sheet for 5 minutes before transferring to wire rack to cool completely.