Beat butter smooth.

Add sugar until fluffy, 3 mins.

Add egg and vanilla.

Add flour, baking powder, and salt on low just until combined.

Divide the dough into 2 equal portions and roll each on parchment to 1/4 inch thickness.

Lay in the fridge on a cookie sheet for 1 hour.

Use a cookie cutter to cut shapes and re-roll the scraps.

Bake at 350 on parchment lined sheets for 9-12 minutes depending on the size you make the cookies.

Cool completely.

Decorate with royal icing and candies!