Preheat your oven to 350°F (175°C) and gather baking sheets lined with parchment paper.

In a large mixing bowl, whisk together the all-purpose flour, baking powder, salt, and ground cinnamon.

Cream together the unsalted butter, granulated sugar, and brown sugar until light and fluffy.

Beat in the egg and vanilla extract until smooth.

Gradually mix in the dry ingredients until just combined, forming a soft dough.

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

Roll out half of the dough on a floured parchment paper into a rectangle about ¼ inch thick, then sprinkle cinnamon filling on top.

Roll the dough tightly into a log and slice into 1-inch thick rounds.

Place the rounds on baking sheets and bake for 10-12 minutes until edges are golden brown.

Allow cookies to cool for 5 minutes on baking sheets before transferring to a wire rack.