For a richer chocolate flavor, use dark cocoa powder. Ensure the cupcakes are completely cool before frosting to prevent the frosting from melting. If you don't have a piping bag, a plastic sandwich bag with a small corner cut off works well. Twist the bag at the top to easily squeeze the frosting. Use other colors of candies to decorate the trees, such as silver or gold dragees. These cupcakes are best served within 1-2 days to maintain the freshness of the strawberries and frosting.