Preheat your oven to 350°F (175°C).

In a medium bowl, whisk together the flour, baking powder, and salt until well combined.

In a large bowl, cream together the softened butter and brown sugar until fluffy, about 2-3 minutes.

Beat in the egg and vanilla extract until fully incorporated.

Gradually add the dry ingredient mixture to the wet ingredients, mixing until just combined.

On a lightly floured surface, roll out half of the dough to about ¼ inch thickness. Cut out shapes using a cookie cutter or knife.

Spoon a generous amount of the brown sugar cinnamon filling onto the centers of the cutouts, then top with another cookie cutout and gently press the edges to seal.

Bake in the preheated oven for 12-15 minutes until cookies are lightly golden around the edges.