Preheat your oven to 350°F (175°C).

In a mixing bowl, whisk together 2 cups of all-purpose flour, 2 teaspoons of baking powder, 1 teaspoon of salt, and 2 teaspoons of ground cinnamon.

In a separate large bowl, cream together 1/2 cup of softened unsalted butter, 1/2 cup of granulated sugar, and 1/2 cup of brown sugar for about 3 minutes until light and fluffy.

Add in 1 large egg and 1 teaspoon of vanilla extract, beating until smooth.

Gradually add the dry ingredient mixture into the wet mixture, stirring until just combined.

In a small bowl, mix 1/4 cup of brown sugar with 1 tablespoon of ground cinnamon.

On a piece of parchment paper, spread half of the cookie dough into a rough rectangle, sprinkle the cinnamon-sugar filling evenly over the dough, and roll tightly into a log.

Slice the dough roll into 1-inch thick rounds, place on a baking sheet lined with parchment paper, and bake for 10-12 minutes or until edges are lightly golden.

Remove cookies from the oven and let them cool on the baking sheet for about 5 minutes before transferring to a wire rack to cool completely.