Preheat your oven to 350°F (175°C).
In a bowl, whisk together flour, baking soda, cinnamon, and salt.
Cream softened butter with brown and granulated sugars until light and fluffy.
Add the egg and vanilla extract to the butter mixture and beat well.
Gradually mix in the dry ingredients until just combined.
Scoop tablespoon-sized balls of dough onto a baking sheet lined with parchment paper.
Flatten each ball slightly with your hand.
Bake for 10-12 minutes or until edges are golden.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.
Dust with powdered sugar before serving.