Preheat your oven to 450 degrees.
Separate your hard candies based on their color. Crush them up in a food processor or a plastic bag with a mallet.
Roll your sugar cookie dough out to 1/4 of an inch.
Cut dough into shapes. Cut out the center of each cookie with a smaller cookie cutter or with a knife. (I used a knife for the stars, but 2 circles for the round cookies).
Place cookies on a baking sheet lined with parchment paper or a silicone liner.
Sprinkle pieces of the hard candies into the middles of each cookie, to fill them.
Bake cookies for 7-8 minutes until cookie just starts to turn golden.
Allow cookies to cool completely on paper/liner before removing to ensure the candy rehardens.