01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, cream softened butter, brown sugar, and granulated sugar until light and fluffy.
03 - Beat in eggs one at a time, then mix in vanilla extract.
04 - In separate bowl, whisk flour, baking soda, cinnamon, and salt.
05 - Gradually add dry ingredients to wet mixture, mixing until just combined.
06 - Stir in rolled oats and chocolate chips until evenly distributed.
07 - Scoop heaping tablespoons onto prepared sheets, spacing 2 inches apart.
08 - Bake for 10-12 minutes until edges are golden and centers slightly soft.
09 - Let cool on baking sheet for 5 minutes, then transfer to wire rack.