Preheat your oven to 350°F (175°C).

In a mixing bowl, combine the brown sugar and softened butter. Cream together until smooth.

Beat in the large egg and vanilla extract until well combined.

In another bowl, whisk together the all-purpose flour, baking powder, baking soda, salt, and ground cinnamon.

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

Prepare a baking sheet lined with parchment paper or a silicone baking mat.

Scoop spoonfuls of dough onto the prepared baking sheet, leaving space between each cookie.

Bake for 10-12 minutes until the edges are golden brown.

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