Preheat your oven to 350°F (175°C) and prepare a baking sheet lined with parchment paper.

In a medium bowl, whisk together flour, baking soda, salt, and cinnamon.

In a large bowl, cream together butter, brown sugar, and granulated sugar until light and fluffy.

Add in the egg and vanilla extract, mixing until just combined.

Gradually incorporate the dry ingredients into the wet mixture until just combined.

Scoop out small balls of dough onto the baking sheet, spaced about 2 inches apart.

Roll each ball in the cinnamon sugar mixture until fully coated.

Bake for 8-10 minutes until edges are set but centers are soft.

Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack.