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

In a medium bowl, whisk together the all-purpose flour, baking powder, salt, and ground cinnamon. Set aside.

In a large bowl, beat the softened butter together with the granulated sugar and brown sugar until light and fluffy.

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

Gradually add the dry ingredients to the wet mixture, stirring gently until just combined.

In a small bowl, mix together the brown sugar and ground cinnamon for the filling.

On a piece of parchment paper, spread half of the cookie dough into a rectangle shape and sprinkle the filling evenly over the dough.

Starting from one edge, carefully roll the dough tightly into a log shape and slice the log into rounds.

Place the rounds on the prepared baking sheet and bake for 10-12 minutes or until golden brown.

Allow the cookies to cool slightly on the baking sheet before serving.