01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk flour, ground cinnamon, baking powder, baking soda, and salt in a medium bowl; set aside.
03 - Using an electric mixer or whisk, beat butter and granulated sugar together until light and fluffy, about 2 minutes.
04 - Add egg and vanilla extract to the butter mixture and beat until fully combined.
05 - Gradually mix in dry ingredients until just combined; avoid overmixing.
06 - Combine rolling sugar and cinnamon in a small bowl.
07 - Scoop tablespoon-sized portions of dough, roll into balls, then coat evenly in the cinnamon-sugar mixture.
08 - Place dough balls on prepared sheets, spacing them about 2 inches apart.
09 - Bake for 9 to 11 minutes until edges are set but centers remain soft.
10 - Let cookies cool on baking sheets for 5 minutes before transferring to wire racks to cool completely.