Preheat the oven to 350 degrees F. Line baking sheets with parchment paper, set aside.
In a medium-sized bowl, whisk together the flour, cinnamon, baking soda, baking powder, and salt, set aside.
In the body of a stand mixer or in a large bowl with an electric hand mixer, beat together the butter with the brown sugar and granulated sugar for 3 minutes until light and fluffy making sure to scrape down the sides in the process.
Next, add one egg and vanilla, mix in the first egg completely before adding the next.
Add the flour mixture to the bowl and mix it in until combined, again making sure you scrape down the sides as you go.
Lastly add in the oatmeal and raisins, mix until they are just distributed making sure to not overmix.
Gran some of the cookie dough and roll two tablespoon-sized balls of dough and place them on the prepared baking sheets roughly 3 inches apart. Slightly press down the tops of the cookie dough balls with your hand so the tops are flat.
Place in the oven and bake for 10-12 minutes until the start to turn lightly golden brown along the edges,
Remove from the oven and let the cookies cool on the baking sheets for 10 minutes before transferring to a wire rack to cool completely.