• Preheat your oven to 350°F (175°C). Line three baking sheets with parchment paper.
• In a large bowl, beat the softened butter and sugars together until fluffy.
• Beat in the eggs one at a time, mixing well after each addition, then add the vanilla extract.

Mixing

• In a medium bowl, whisk together the flour, cinnamon, baking soda, and salt.
• Gradually add the dry mixture to the wet mixture and mix on low speed until just combined.
• Gently fold in the oats until evenly distributed.

Baking

• Scoop out dough balls roughly 1 to 1.5 tablespoons in size and place them two inches apart on the prepared baking sheets.
• Bake one tray at a time on the middle rack for 10 to 13 minutes, until the tops look just set.
• Let the cookies cool on the baking sheet for at least 10 minutes before transferring them to a wire rack.