Preheat the oven to 350°F and line a baking sheet with parchment paper or lightly coat with nonstick spray.
In a medium bowl, mix together the flour, cinnamon, salt, baking powder, and baking soda. Set aside.
In a large bowl, cream the softened butter with a hand mixer for about a minute. Add the brown sugar and granulated sugar, then mix until light and fluffy, about three minutes.
Add the vanilla extract and eggs, mixing just until combined.
Gradually add the dry ingredients into the wet mixture, using a hand mixer to combine. Be careful not to overmix.
Fold in the rolled oats using a spatula until evenly distributed in the dough.
Scoop the cookie dough onto the prepared baking sheet, spacing each about two inches apart to allow for spreading. Bake for 11-13 minutes, or until the edges are golden brown.
Remove from the oven and let cool for five minutes before transferring to a wire rack. The cookies will be soft but will firm up as they cool.
Recipe Notes:
Use Rolled Oats – Quick oats will change the texture; stick with old-fashioned rolled oats for the best chew.
Softened Butter is Key – Room-temperature butter creates the perfect light and fluffy texture when creamed with sugar.
Don’t Overmix – Overmixing can make the cookies dense; mix just until combined.
Chill for Thicker Cookies – If you prefer thicker cookies, chill the dough for 30 minutes before baking.
Watch the Bake Time – Cookies should look slightly underbaked in the center when removed from the oven—they will firm up as they cool.
Cooling Tip – Let cookies rest on the pan for 5 minutes before transferring to a wire rack to prevent breaking.
Storage – Store in an airtight container at room temperature for up to 1 week or freeze for up to 6 months.
Freezing Dough – Freeze pre-scooped dough balls and bake straight from frozen, adding 1-2 extra minutes to the bake time.