Rinse the strawberries and gently pat them dry. Make a clean slice from the base of each strawberry to remove the stem and create a base for the bottom of the strawberry “tree.”
Place candy melts in the top pan of a double boiler. Heat over simmering water, stirring frequently, until the candy melts are smooth. Remove from over the simmering water. Dry the bottom of the pan with a dishtowel.
Use a toothpick or fork to dip the strawberry into the candy melt mixture. Tap off the excess candy from the strawberry.
Use a second fork to lift the strawberry from the dipping tool and onto the center of a cookie. You can also place a small dollop of the melted candy onto the center of the cookie before setting the strawberry down.
Sprinkle nonpareils over the dipped strawberry and place a star on top before the candy hardens.
Reheat candy melts as needed to keep the mixture dippable.