Place the butter and sugar in the bowl of a stand mixer or electric hand mixer and beat until light.
Add in your egg and vanilla and beat till combined.
Combine your flour, baking powder and salt in a bowl.
Turn your mixer off and add your flour mixture.
Beat slowly at first to incorporate the flour, then higher until it forms a dough.
Form your dough into a ball and place into cling wrap and place in the fridge to chill for 1 hour.
While the dough is chilling, crush each colour of your lollies separately. You can do this with a ninja blender or you can place the lollies in a ziplock bag and give it a good whack with a rolling pin.
Roll out your dough to 7mm (approx. 1/4 inch) thickness.
First cut out the large cookie star. Place on the baking tray and cut the inner star with the smaller cutter.
For the moons, you can cut out a circle using a large circle cookie cutter. Then a smaller cookie cutter on the edge of the circle to create the moon shape. Cut the inner of the moon with a small moon cutter. If you don't have a cutter you could use a knife instead to cut the inner moon.
Pre-heat oven to 160c.
Place in the fridge for 10 minutes.
When the oven is heated, place the cookies in.
Bake for 7 minutes.
Remove from the oven and place 1 1/2 teaspoons of the crushed lollies into each gap.
Bake for a further 5 minutes (or until sugar has melted and filled the gaps).
Remove cookies and set aside to cool.