Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper.

Cream together butter and sugar until light and fluffy. Beat in the egg and vanilla extract.

In a separate bowl, whisk together flour, baking powder, and salt. Gradually add this mixture to the wet ingredients until combined.

Wrap dough in plastic wrap and chill in the refrigerator for at least one hour.

Roll out dough to about ¼-inch thickness on a floured surface. Cut out cookie shapes.

Cut smaller shapes from the center of each cookie and fill with crushed candies.

Bake for 8-10 minutes until edges are lightly golden, then let cool before enjoying.